I was thinking about removing a Used Set, and rather than Delete it. That way, if for some reason in 6 months, a client has a similar booking, you can Restore the info rather than trying to remember everything, or loacting an old Setlist PDF?
If you add dates to your set lists (Basic accounts) or attach them to events (Plus and Pro accounts), they will appear in a list sorted newest to oldest by default. So old set lists will move down the list and out of view, but will still be easily accessible by scrolling down or searching.