Comment 4 for bug 1468103

> Independent of cloud-init, things in rc.local should be run as "the last thing in boot".

So now we have "last thing except cloud-init" :-) There are other services which order themselves after it, like getty@, plymouth-quit and others, to avoid disturbing init.d/rc.local scripts with allocated VTs or plymouth going away. This was more or less the same case with upstart.

But nevertheless it should run at least after the init.d scripts (and their unit counterparts), to maintain backwards compatibility with that. This still isn't robust (if you need to run after something it's always correct to actually declare it), but might help in some situations.