Comment by krylon

On openSUSE Tumbleweed, it is. Each Upgrade creates two snapshots, one before, one after, and if anything goes wrong, I can boot into a snapshot where the world was still in order.

I have a higher opinion of ZFS than I do of btrfs, but FWIW snapper+btrfs has worked well for me on openSUSE Tumbleweed for ten years now, too.