[vbezhenar]

I'm surprised that they did not do that yet. While ZFS license status is questionable, Canonical seems to be sure that everything's OK, so they should embrace its technical superiority. Something like full system rollback after bad update is trivial with snapshots and it's extremely useful feature.

[johnramsden]

Looks to be that's what they have done. They've developed a new tool called `zsys` https://github.com/ubuntu/zsys which will help with system administration, rollbacks, auto snapshots before and after package changes. I believe it will also support boot environments.