Oh, that plasma. Yeah, that naming conflict is totally not confusing.
You could switch all your repos to the core Arch ones. I did that by accident once, and it was fine (although, I did switch them back eventually). Maybe it’d add release stability? I’m not really clear how the EOS repos vary off the baseline, except by adding some custom packages.
Inspired by our discussion, I installed snapper on two boxen. I included snap-pac and snapper-support to get system change and grub integration; there’s probably also a utility out there that adds visudo-like snapshot-before-manual-edit of anything in /etc. If not, it’d be an easy script. snapper-gui and btrfs-assistant both look useful. While I’m comfortable with rescue SDs and restic backups, what I’m seeing with Arch’s snapper package is pretty nice, and super easy.
I suppose anything that borks grub is going to be a PITA no matter how immutable your OS, or how fancy your rollback. Or - god forbid - fucks up your BIOS firmware. I have never had that last happen, yet (knock on wood).