@hobbsc I believe @munin comes from a security orientation: PID 1 should do very few things: start your system, launch processes, kill processes, shut down your system, and a couple of others. Systemd is just too invasive for that role.
I'm personally uncomfortable with this, and with the way it suddenly conquered nearly every distro. I'm not otherwise against it, but I do intend to swap the family's VPS fleet to Devuan instead of Debian (have not found a non-systemd replacement for CentOS yet) pending consultation with the kids.
OTOH, whenever I've had #systemd on a computer or VPS from the beginning, I haven't had much of a problem. Switching from #sysvinit ("upgrades" by the distro), however has always failed, requiring a from-scratch reinstall to make the computer operational again.