Ignoring anticompetitive behavior, Windows is the only thing that works on most computers and is usable by most people. If you buy a computer, and it's not a MacBook, Windows is the only option.
20 years ago hardware support was a major concern for us Linux aficionados. 10 years ago it was a minor concern. Today I think you may have some issues with newer apple hardware, but it's not like you can install windows on that either, and there are projects with some progress towards running Linux on those too.