Not to say I would be a great fan of Linux, but I think at this point it's quite clear it's the huge winner of OSes. Nearly all servers run on it nowadays, I think all relevant smartphones (not sure though, correct me if that's wrong), many desktop/laptop computers and even Windows is integrating more and more with Linux.

With such a dominance there is not much point in syncing changes of the standard with other OSes. The moment it works different in Linux that is the new majority standard.

And while a lot more stuff is changed all the time than would be necessary one also can't expect things to stay the same for another 100 years just because they have been like that for a long time.