Have a rolling backup of the user's beets db? How big is the average beets database?

[RollingStar]

I don't see any backup related code in the codebase. The user shouldn't rely on us for backups, but on the other hand, how hard would it be to make library_backup.db by just copying the db ahead of certain actions? Even easier would be copying each time beets is run, perhaps with a date check so it only copies once per day. With 522 albums I have a 72 MB library. That's 140 KB per album with some plugins and stuff.