There is absolutely no way that happens. Apple cares about Unix compatibility for very good business reasons. Apple gets a lot of value from being even just Unix-ish. It's the same reasons Microsoft eventually knuckled under and made WSL -- the ubiquity of Unix conventions and tooling is just too cemented in the industry.

POSIX conformance is a cherry on top, and it helps get them certain sales that require a conforming Unix. But that's not the real value to the platform.