Maybe they should buy Crossover and make it part of macOS

Absolutely no! Previous acquisition prove that they'll stop any kind of work on Linux (that means backports on Wine, codeweawer is a massive sponsor) and for almost nothing.

And the end result will be like Rosetta, introduce a perfect interpreter but discontinue and remove it from the operating system a few years later because you want to push developers to make native builds and push consumers to throw their perfectly working PowerPC and buy an Intel Mac