I had the 22 upgrade completely bomb out of the installer and got a kernel panic on reboot. I booted off of a live boot image, launched Timeshift and restored it. Within 20 minutes my broken install was back to where it was before the upgrade. It was really invaluable.
I have had a hell of a time trying to get Shadow Empire running. It’s the only title I have found that doesn’t have kernel-level anticheat that doesn’t work on Linux.