System files aren't writable by normal users in any Linux distribution. System recovery from backups is pretty easy and well understood too, so I'm not sure wh

System files aren't writable by normal users in any Linux distribution. System recovery from backups is pretty easy and well understood too, so I'm not sure what benefit this would bring. If you want transactions you can install on btrfs and use apt-btrfs-snapshot to automatically take snapshots. It seems this isn't that well-known though, probably because the problem it solves isn't very serious. As for Android, it's already a frustrating system on phones, something like that on desktops would be total trash.