I think a big issue is that Microsoft is allowed to "sponsor" schools and so create a microsoft only ecosystem for schools, going so far that teachers require s

I think a big issue is that Microsoft is allowed to "sponsor" schools and so create a microsoft only ecosystem for schools, going so far that teachers require specific formats and software that are not (properly) accessible without MS Office. IMO there should be laws that prevent students from having to learn a system that costs a lot of money and is way inferior in many points.