Theorem 2.71 All software is shit.

Corollary 3.14 So stop the braindead OS wars. All OS are shit, too.

Proof. The only software that can stay beautiful and clean is software that is never used. Maybe if you are Dijkstra or live in a Haskellian world, you might come away with it, but for the rest of us our artifacts have to interact with other artifacts or are build upon strange historically grown systems, they have to deal with users who will put it to creative use.. and in the process we also actually might have to alter some state.
Or put another way: code is a social construct. Like science are the beliefs and superstitions grown by a scientific community, software is the montainous dunghill produced by our laborious efforts to make shit even work. Of course this only piles the stack higher and higher until you can already smell it from the moon.