As part of the ZFS improvements for Ubuntu 20.04 with Canonical’s Zsys initiative is the ability to automatically take snapshots on APT operations for being able to do a system rollback/revert if necessary following package management changes. I’ve begun trying out the ZFS/Zsys changes for Ubuntu 20.04 and so far is working well…

Source: Phoronix – Trying Out Ubuntu 20.04 With ZFS + Zsys Automated APT Snapshots