Raf Alencar
Running on DefaultMAR 25, 2026

That Excel Mike Built in 2013

AI will replace everything — except the load-bearing spreadsheet nobody understands, nobody can touch, and the entire reporting cycle runs through.

The core argument

AI will replace everything. Except the load-bearing spreadsheet nobody understands, nobody can touch, and the entire reporting cycle runs through. This is not a technology problem.

You Know This File.

Mike's Excel — the load-bearing spreadsheet that runs the monthly close, the model behind the dashboard, the report nobody can touch

You've worked with it. Maybe you've built one like it. Maybe you are Mike.

It's the spreadsheet that runs the monthly close. The model behind the executive dashboard. The report that six people refresh every Monday morning. It was built by someone who saw a gap — a process that didn't exist officially, that needed to exist, so they built it.

And now it's load-bearing infrastructure that nobody fully understands anymore. Mike might still be there. Or Mike might have left in 2019. Either way, the file is still running.

Why Mike Built It In The First Place.

Mike at his desk, building the spreadsheet because the official channel was too slow to bother with

In most companies I worked in, IT meant helpdesk support. Getting actual software approved meant convincing your director to allocate budget, then waiting months for a security review, then watching the project dissolve in a committee. Asking IT directly meant a significant engagement, a project manager, and enough bureaucracy to outlast your tenure.

So people like Mike stopped asking. They built.

I did it too. I built entire parallel processes on top of broken systems and maintained them personally, hoping that someday IT would formalize them. Sometimes they did. Most of the time, those processes just became load-bearing infrastructure that no one wanted to touch — because touching them meant breaking something no one fully understood anymore.

Before We Go Further — A Quiet But Serious Problem.

Spreadsheets uploaded to free AI tools, leaving the data boundary your organization carefully drew

If you're uploading spreadsheets to AI tools right now to get around this bottleneck, stop and ask one question first: where is that data going?

Most "free" AI tools are not free. Your data is the product. Uploading a financial model, a customer list, or an operational process to an unvetted platform is not a workaround — it's a liability. The urgency to move fast on AI is real. But the people who will regret it most are the ones who didn't pause here.

Bureaucracy Is Not Incompetence. It's an Immune System.

The iceberg under the org chart — the immune system isn't visible, but it's what kills every initiative that doesn't fit the process

The CFO, Legal, HR, IT — they're not obstacles because they're bad at their jobs. They're obstacles because their jobs are to maintain order. They are, structurally, agents of stability. And stability and innovation are not compatible at the same speed.

That's not a criticism. An organization without that immune response would fail differently — chaotic, unscalable, exposed. The problem isn't that the function exists. The problem is that no one ever built the interface between the innovation layer and the stability layer.

So everything that didn't fit the process either died waiting for approval or survived as Mike's Excel file: mission-critical, undocumented, fragile, untouchable.

This is why most companies are structurally bad at innovation. Not because people aren't smart. Because the incentive structure doesn't reward building things that are visible, transferable, and maintainable. It rewards getting the work done by whatever means necessary. Those are different things.

What Changed — And It Changed Fast.

Operator plus agent stack — the leverage an experienced builder now brings into an engagement

Until recently, building something real required either a large budget or a decade of technical depth. Excel and its macros were the ceiling for most operators. You could automate a workflow, but you couldn't stand up an API.

That ceiling is gone.

I needed my AI agent to process and edit video. In less time than it would have taken me to evaluate subscription options, I took a detour and built a full API wrapper around FFmpeg — an open-source video processing engine that every developer already uses. Two hours. Free. Does everything I needed. No vendor dependency. No data leaving my environment.

That is not a developer story. That is what happens when an operator with domain knowledge gets access to a fully capable AI coding environment. The constraint was never capability. It was always access.

Now access is table stakes.

I'm not just bringing my knowledge to engagements anymore. I'm bringing me — plus the agent stack I've built, the orchestration layer I've designed, the systems that run in parallel while I'm doing something else. The knowledge is the same. The leverage is entirely different.

The AI Revolution Will Not Come from the Program Office.

Behind the curtains — the operators already shipping while the steering committee is still drafting policy

They're going to run AI transformation programs. Steering committees. Centers of excellence. Procurement processes for approved AI vendors. And those things will produce something — probably a policy document, a few approved tools, and a dashboard that shows AI adoption rates.

Meanwhile, the Mikes of the world — the operators who have always built things when the official path was too slow — will have already built something real. Quietly. With tools you didn't approve. Inside data boundaries you haven't mapped.

The AI revolution is already happening in your company. The question is whether you're going to find out about it before or after something breaks.

What Should Actually Happen.

Innovators with real tools, IT and Legal following close behind, deliberate handoff protocol — the team that prevents the next Mike's Excel

Give select innovators access to real tools. Not a curated list of approved SaaS products — actual capability. Then have a small team of IT and Legal follow close behind: securing what gets built, formalizing what survives, changing process ownership when the evidence demands it.

Make it a token conversation, not a salary conversation. The cost to experiment is fractional now. The cost of missing the experiment is not.

Start building an internal microservice stack. If a vendor's tool is expensive, let someone build a leaner version in-house. The data stays internal. The capability stays owned. The process becomes serviceable by more than one person.

What this team actually looks like:

  • A small group of proven operators with domain expertise, AI tool access, and explicit permission to experiment outside normal procurement timelines.
  • A lightweight legal and IT function that follows behind — not in front — securing what gets built, formalizing what proves out.
  • A clear handoff protocol so that what Mike builds doesn't stay Mike's. The work gets documented, ownership gets assigned, and the process becomes institutional rather than personal.
  • Leadership decisions made explicitly about process ownership and delegation — not left to default to whoever was already doing it.

And Deal With Mike's Excel File.

Not to replace it — to understand it, document it, and decide deliberately whether it should survive in its current form.

Because if it can't be touched, can't be serviced, and is sitting in the middle of your critical path — you've already lost the AI transition before it started.

Mike's file is a symptom. The real question is what it says about how your organization handles the work that gets built outside the official process. Does it get formalized? Does it get resourced? Does it get handed off?

Or does it just become someone else's untouchable file in 2031?

The Constraint Was Never the Technology.

It was always the same thing: teams that aren't structured to innovate, processes that can't be transferred, and leadership decisions about ownership that get made by default instead of intention.

AI is the most powerful change agent most organizations have ever been handed. And most organizations are going to use it to go faster inside the same broken structure.

The ones that don't will have decided — deliberately — to deal with the structure first. That's not a technology decision. It's a leadership one.

Next: The person most likely to make sure Mike's file never gets formalized has been with the company for eleven years and was just promoted.

Common Questions

Why do load-bearing spreadsheets like Mike's Excel persist in mature organizations?
They persist because innovation has nowhere official to go. When sanctioned channels are slow or absent, capable operators build in the shadows. The spreadsheet is mission-critical because the underlying need is real — and stays personal because no one ever formalized ownership.
Is bureaucracy the cause of shadow infrastructure?
Bureaucracy is an immune system designed for stability. The cause is the missing interface between the innovation layer and the stability layer. Without that interface, every new build either dies waiting for approval or survives undocumented and untouchable.
What changed about who can build real software inside organizations?
Until recently, building real systems required either a large budget or a decade of technical depth. AI coding environments have collapsed that gap. An operator with domain knowledge can now stand up production-grade tooling in hours — which means the constraint has shifted from capability to access.
What should organizations actually do about Mike's spreadsheet?
Understand it, document it, and decide deliberately whether it should survive in its current form. Then design the team that prevents the next one — innovators with real tools, IT and Legal following close behind, and explicit handoff protocols so personal builds become institutional capabilities.
Related Reading
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