I have an old laptop, where I installed Ubuntu on a tiny SSD (formerly a hidden recovery partition in Windows). It was only 10GB so eventually it filled up, and when looking around I discovered that 2GB were being used to save multiple old versions of snaps. Further, it turned out that there weren’t any options for changing this behaviour, and one would regularly have to manually delete unnecessary backups. And to do that, there weren’t any simple command like “snap cleanup”, but rather a pretty complex chain of commands that searched for older versions and deleted them. IIRC it was snaps for gtk and gnome that took a couple of hundred MB each, and each with 3 different versions stored.

This was a few years ago, so it’s possible that some things have changed… And having the option to roll back packages can of course occasionally be useful in case of failure, but what turned me off was that his was being done against my will, and the feeling of Canonical trying to remove control from me in an attempt to idiot-proof my computer. I like using Linux because it gives me control, and that it doesn’t remove or hide “advanced” features to try to prevent people from breaking their own computer. I don’t mind if app stores or snaps exist as an option, but I get defensive when it feels like things I don’t like are being forced on me.