@rysiek @moritzheiber One interesting side effect I found on this with Deb/Ubuntu: If the service was originally written as a SYSV unit, it's enumerated by systemd on boot, creating on-the-fly unit files. Thus, any changes you make using systemctl won't persist, as it will be recreated next boot.

I learnt this the hard way with Avahi (which is socket activated), when I couldn't understand why it kept coming back. I had to actually remove it to get it to stop.Not really a shortcoming of systemd as much as it is the distro maintainers, but really, really odd behaviour.