Microsoft is well aware of that, they went as far as not making first party titles exclusive for the Xbox, and releasing them on W10. It's a competitive advant

Microsoft is well aware of that, they went as far as not making first party titles exclusive for the Xbox, and releasing them on W10. It's a competitive advantage and they won't be giving it up so easily, they know a lot of people would drop Windows in a heartbeat were not for it being "the" PC gaming platform. Even if Apple decides today to invest heavily in having games as first party citizens in macOS (something that they never showed interest in), they would still need to deal with the 20+ years of backward compatibility and huge existing library that Windows has.