On openSUSE they have snapper snapshotting integrated into package management, so it automatically creates a snapshot before and after updates. And if something would go wrong you could easily select an old snappshot to boot from in the GRUB menu.

Oh yeah. Can’t wait for this. Bad session management/restore is basically the only major thing I still miss a lot on Wayland. Hopefully Firefox and other apps will gain support for this soon (I guess all Qt/KDE apps will get support at once when they also add support to Qt and KDE Frameworks). Anyways I just opened the enhancement request for Firefox for this just hoping they will add support soon.