

They don’t go away on their own, every installed snap is mounted as its own loop device and snapd keeps an older revision or two so it can roll back, so the number moves around after updates. snap list --all shows which snaps they are, if one says disabled that’s the old revision and you can remove it with sudo snap remove <name> --revision=<rev>. about libation, if it’s installed as a snap itself that could be the actual problem, snaps are confined and can’t read folders outside your home or on other drives unless you connect the removable-media interface, so I’d check that before worrying about the loop devices.

on the fear part, in a healthy team the author still owns the change, the reviewer is a second pair of eyes not an insurance policy. what helped my people a lot was asking the author how they tested it and what happens if it goes wrong, if they can’t answer that’s your review comment right there. and if something breaks after you approved it, you fix it together and add a check so it doesn’t happen again, nobody serious blames the reviewer for that