False dichotomy. And it still does not explain why Linux will be anything more than a bitplayer on the desktop.
I use MacOS and Linux on the desktop exclusively, and there is nothing that would prevent me from doing so for the foreseeable future. There is no need to hyperventilate over what Microsoft might do.
BTW, the specific supposition you make above is absurd and will never materialize in a meaningful way for a great many reasons that may have escaped you.