Forking a compiler is a gigantic pain. None but the most hardcore would bother. It's far easier to give up pushing the boulder and go use something else, which

Forking a compiler is a gigantic pain. None but the most hardcore would bother. It's far easier to give up pushing the boulder and go use something else, which I hazard to say many have done. Or, they see the difficulty in using ports for stuff and never even start using the language.