Ubuntu recently decided to phase out its homegrown upstart init system in favor of systemd, which is backed by all other major Linux distros. Right now Ubuntu

Ubuntu recently decided to phase out its homegrown upstart init system in favor of systemd, which is backed by all other major Linux distros. Right now Ubuntu is trying to go against the grain again, this time with Mir. I think the most likely scenario is that Ubuntu will eventually drop it too and switch to Wayland. Ubuntu is big, but not big enough to break compatibility with everyone else in such a major way. Thus it is good that they did not put Mir in a LTS release. It is a dead-end technology if you ask me.