It can't be neglected that Microsoft is alienating its own power users on such a level that they are now considering switching over and bringing all their know-how with them. Linux gaming is also faster because there's more developers interested in making gaming work outside of the Microsoft dominion.
They still prioritize developers, look at .NET Core, Typescript, NPM, Github (lol), but the problem is that they're not Windows exclusive enclaves anymore. In fact, I'd bet most people now deploy (and probably develop) .NET Core on non-Windows machines.
