For a boring stop, I ended up on OpenSUSE Tumbleweed.
It's not too boring, and at the same time, once you set it up, it just works and does what you ask it to.
It's also very drama-free, not taking radical and controversial steps and not breaking someone's workflow.
In case something got broken anyways, rollback functionality is set up nicely out of the box on btrfs systems, and snapshots are automatically taken before any updates.
This rollback functionality, along with extensive automated testing of all packages in the official repos, also makes it pretty much the only stress-free rolling release experience.
For all I remember, Timeshift only supports /home snapshots, which won't help to revert the system. Could be wrong though.
I'm happy you're happy about your distro, though!