@mcc I've run Arch for years and it's remarkably stable, but when something does get out of sync there's no real rollback. I just kind of hack around things to fix a random issue until it's resolved... which isn't great. But it's worth it for me since it's infrequent.
https://wiki.archlinux.org/title/Arch_Linux_Archive is often listed as a way to "rollback" but I'm not sure I know anyone who actually uses it? Usually forums just say to do backups or to "upgrade more often"...neither of which are answers imo.