If you don’t know what “X” is, read up here. Simply, X is basically the pile of code that provides a graphical user interface for many Linux and some BSD-based desktop systems. And this guy is absolutely right: The X Windows system could learn some stuff from the big, bad, empire. I’m not a hardcore Linux desktop guy (I use it for servers quite a bit), but my experience with it matches his quite well — it doesn’t take much to break it and bring your system down with it.