Pet Peeves, Part 2 (aka today):
- changing interface names after I got new server up-and-running, and tested it with a reboot to be sure

Is this because I ran updates and rebooted again?

Thank you, remote console. Eff you, whatever mechanism changed interface names from em[1-4] to eno[1-4].

THIS IS A SERVER! Server network configuration SHOULD NOT CHANGE after I configure, test, reboot, and test again. Not application TCP ports, and not interface names.

That is all.