- Remember that a rolling distro is bleeding edge. That means that from time to time you WILL encounter some issues.
- Tumbleweed is (somewhat) unique in its approach to rolling. The quality checks that occur on openQA partially mitigate failures by withholding the next distro upgrades until they can be reviewed. However, the openSUSE devs are not perfect, openQA is not perfect, and some times rolling forward with a known issues is deemed acceptable.
- This is where btrfs comes in. The answer to your question of what to do if zypper dup fails is two part: A) roll back to the automatic "pre" snapshot taken by snapper before the dup. B) Just wait for the devs to fix the issue!
- If you are impatient, you can check for progress on a specific issue by searching the issue on https://bugzilla.opensuse.org/, or chat up the community either on the forums or on the matrix space in the support room.
Feel free to ask questions anytime!