Really not good enough from AMD. I wonder if Intel wasn’t a complete dumpster fire right now if they would still cut off the fix at Zen 3 (I doubt it). There’s really no reason not to issue a fix for these other than they don’t want to pay the engineers for the time to do it, and they think it won’t cost them any reputational damage.
I hate that every product and company sucks so hard these days.
I’ve had two different arch based distros have issues when trying to update after long periods. I also had an Ubuntu server fail completely when doing a major version upgrade and had to restore it from backup. But then again I’ve also had no trouble updating an Ubuntu machine that was a couple years behind.
I’m on Fedora now for my desktop and it’s been great so far, but I also do updates at least weekly. My advice would be if you expect to go months between updates your best choice is probably Debian.