I work in a Danish municipality with 100.000 citizens. We operate more than 300 IT systems, some of these are one of a kind systems that have no alternatives and some of those only run on Windows.
We also have 8000 employees, a lot of them couldn’t tell you if the smartphone they use each day is an android or an iPhone. They know windows and they know office, switching them to pages and macOS would be almost impossible, Linux and libre office is out of the question.
We have an IT staff of skilled people who were willing to skip pay for ideology they are all certified Microsoft and have little other education. They could all easily leave for other positions in the Microsoft infrastructure. It would cost around a million to replace just one of them.
We could easily switch our tech to Linux, we would need to build a lot of replacement software but that could be done in a reasonably manner, but moving the business side to Linux would be the most expensive thing we ever did.
Which is why I’m a skeptic of something I believe should happen. We pay a tech tax to Microsoft, by we can’t stop. It’s just not doable.