Will this be an integral part of systemd, or will they release it as a separate thing? I mean, if I like it, but I'm not using systemd (I do use it, but I'm just thinking about it), could I use this run0 (horrible name) without having to buy into all of systemd?
The article says it works by messaging systemd to run the process as the given user, rather than being a SUID binary. So it wouldn't work without systemd.
I really don't care about the command I use to get elevated privileges. On my Debian servers I use su and maybe in future, if Fedora decides to make the switch, I will use run0.