> What else is lurking that you and I aren’t aware of?

All of systemd... and network manager/modem manager/...

I grew up with static configuration files, init scripts, inetd, etc... then grew into Solaris smf, dtrace, zones ... and then Linux implemented systemd. I really miss smf and related tools but systemd is still just meh to me. The implementation feels like a somewhat half-in-each-world brainchild.

The problem is that SSH is usually the admin interface to the system. You don't want unnecessary moving parts between you and your remote shell access when you need to troubleshoot a half-running system.