Tumbleweed solves the first issue as well by running BTRFS by default on root with snapper configured. I’ve done a few rollbacks in the 3-4 years I’ve used it, and it’s way better than trying to fix an Arch system with pacman. I could get the same effect with Arch, but most users aren’t going to consider BTRFS or ZFS on root with Arch (I had BTRFS on /home on Arch, but that didn’t help much).
What about LVM snapshots? I assume everyone sets up LVM nowadays anyway.