Comment by direwolf20 2 days ago
You're not thinking like a systemd developer. The right thing to do is to ignore all anecdotes and direct evidence that a problem exists. I am talking about systemd renaming your network interfaces because you added or removed hardware.
hardware paths change when you add or remove hardware. systemd developers deny this despite it affecting half of all desktop computers in existence. Your one network jack used to be eth0, systemd now changes it each time you add or remove hardware and insist they're making it more stable instead of more variable whilst they are making it more variable.
Yep. I've experienced on several computers that the systemd-approved "predictable" network device name changes when adding or removing a SSD. The solution is to turn off the network device renaming and allow the single ethernet interface in the machine to always be known as eth0.
systemd developers like to come up with clever solutions to the problems they care about, and ignore the side effects for any use cases they don't care about. And quite often those afflicted use cases are the ones most people would consider to be the more typical use cases.
systemd should add and remove interfaces connected in the exact same hardware path with the same name they had before.
Default literally insane legacy behaviour is just vomiting eth${RAND} where RAND depends on racing conditions.
My educated guess is that people that insist on using the legacy eth${RAND} never had a surprise random firewall and routing rules suddenly apply to different interfaces at a inconvenient time, making production halt and catch on fire, yet.