Of course, the problem is that in the last 38 years [1] plenty of programs have been developed for Windows-only, especially when you have to interact with the state [2]: there are still tutorials out there that require you open a website in Internet Explorer (!) if you want to validate a tax form or whatever other trivial task.

[1] https://en.wikipedia.org/wiki/Microsoft_Windows_version_hist...

[2] All the backroom deals for Windows/Office licenses for state-use certainly helped in this regard, https://www.zdnet.com/article/linux-not-windows-why-munich-i...