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.
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.
