"The long litany of examples includes Ubuntu Unity, Gnome Shell, KDE 4, the /usr partition, SELinux, PolicyKit, Systemd, udev and PulseAudio, to name a few."
Add to that systemd's ambition to take the place of package managers now.[0]
Really, I've come to the conclusion that the major Linux distros are no longer Linux distros. They're systemd distros.
Anyone who wants to continue to use a traditional Linux distro (or even a traditional unix) is better off looking elsewhere.
[0] - http://0pointer.net/blog/revisiting-how-we-put-together-linu...