They don’t use it because there’s absolutely no need for them to do so when Windows is a fantastic OS for their needs

The issue has never been whether Windows is a good OS or not. Almost anything you can do with Linux you can also do with Windows[1]. The issue has always been the risk that Microsoft could pull the rug from under your feet and the fact that there's nothing you can do about it as long as you're on their platform. You can see all the bullshit that people have had to deal with in the past 10 years as the result of people being comfortable with taking that risk - shitty upgrades, telemetry, ads, and now this. And nobody even knows what other kinds of bullshit they'll try to pull in the future.

None of this to say that you have to choose one platform or another. Everything is a calculated risk. Use Windows if that's what you want, but by this point, it's clear that you will have to continue with putting up with more and more of this abusive behavior from Microsoft if that's the choice that you're making.

[1]: This is somewhat starting to change though. These days, for a lot of programming- and data science-related tasks, Linux is starting to pull further and further ahead and Windows is becoming more and more unusable.