[jrslack]

>though they view that they should be the only user of cgroups

And they're absolutely correct. There can only be one cgroups manager on the system. cgmanager isn't finished, either.

>As an example, Gnome now uses parts of systemd for session management (replacing consoleskit, and others). While there are workarounds, this means no one can really use any other init system besides systemd, or things won't work correctly.

Gnome requires logind, which is the successor to consolekit. Gnome has repeatedly stated that they're willing to work with the BSDs et al with workarounds. You can either use the old logind, which doesn't require systemd as PID1 (due to cgroups management changes) or you can develop your own replacement to logind, one that doesn't require systemd as PID1.

People criticize these decisions, but they have no suggestions on how to fix it and, for the most part, they have no inkling of why there's a requirement.