https://docs.bazzite.gg/Installing_and_Managing_Software/Updates_Rollbacks_and_Rebasing/rebase_guide/

This should answer most, if not all of your questions.

It’s important to remember, that you should rebase to the same DE to avoid issues. Although there shouldn’t be any data loss when rebasing, a backup of your files is recommended.

Edit: Forgot to write, that these principles apply to all atomic distros. But depending on the distro you’re using, the rebasing commands might be slightly different. So always look on the documentation of your distro.

Happy to hear that it changed for the better. I’m still on Android 10, where it sadly isn’t the default. But thanks for letting me know :)

I’d prefer that notifications are blocked by default (should be opt-in instead of opt-out). The only apps I NEED notifications for, are messaging apps, everything else is just annoying.