[microtonal]

This is a benefit, but other distributions are catching up. For example, Fedora Silverblue has an immutable root filesystem and provides atomic upgrades/rollbacks through OSTree. Ubuntu 20.04 supports making ZFS snapshots as an APT pre-installation hook and thus also support rollbacks.

[pkulak]

And don't forget OpenSUSE, which has been making btrfs snapshots before and after every upgrade for years(?) now. OpenSUSE doesn't seem to ever get the recognition it deserves.