That depends. Is the spreadsheet doing what it's intended for, or one of the hundreds of things it can do but really shouldn't?

I've made my fair share of spreadsheets, including time tracking, vehicle scheduling, email automations, map integrations, god forgive me even 'databases' - all of that because no one was willing to pay for a proper solution.

So I'm not saying spreadsheets can't or shouldn't ever be used for those things, but a dedicated solution for a problem may indeed be a good reason to change things.

<.<

We have an excel. It’s more… a group of excels? They call each other. Opening and running VBA within each other. The excels are “run” nightly, and take well over an hour to do their thing.

Should we just keep it in Excel?

They change it because they need more money. (talking about Excel here)
And soon you'll see ads in the fn suggestions drop down
and ads in unused cells
and ads while the Solver is running (made in VisualBasic, running on top of WebAssembly, running on interpreted Python, using a Java Interpreter on your Web Browser to make sure you watch the ad for as long as possible)

And that's why we need to make our own spreadsheet software.