Great piece of information. I personally don’t see the benefits with immutable distribution, or at least it (without any experience) feels like that I’ll spend more time setting it up and tinkering with it than actually recovering from a rare cases where things just break. Or at least that’s the way it’s used to be for a very long time and even if something would break it atleast used to be pretty much as fast as reverting a snapshot to fix the problem. Sure, you need to be able to work on a bare console and browse trough log files, but I’m old enough that it was the only option back in the day if you wanted to get X running.
However the case today was something that I just couldn’t easily fix as the boot partition just didn’t have enough space (since when 700MB isn’t enough…) even a rollback wouldn’t have helped to actually fix the installation. Potentially I might had an option to move LVM partition on the disk to grow boot partition, but that would’ve required shrinking filesystem first (which isn’t trivial on a LVM PV) and the experience ubuntu has lately provided I just took the longer route and installed mint with zfs. It should be pretty stable as there’s no snap packages which update at random intervals and it’s a familiar environment for me (dpkg > rpm).
Even if immutable distros might not be for my use case, your comment has spawned a good thread of discussion and that’s absolutely a good thing.