Arch isn’t inherently unstable. It’s just that most users don’t maintain it properly. Tips:
- learn to backup for real: rsync, borg, etc. you broke something? Just back up to that image you made right before you updated ;)
- use flatpaks. It’s kind of hard to run into AUR or dependency issues if you’re as close to a base arch install as possible.
- read the maintenance page and understand it. You can’t just “yay” every week and be done with it. You need to know how to handle pacnew, read the wiki for manual interventions, look for errors and warnings in the pacman log, etc. it’s not hard at all once you figure it out, but it takes a little learning.
- you don’t need to update every day. If it’s working - you can just let it ride. If you don’t update forever, then just update your keyring first and you’ll be good to go.
Use what you like - it’s all stable enough.