My campaign finally had a long rest after being in a wizard's tower for the same day since at least July (it's like real life). I know I used Augury more than once, and I immediately prepared Divination and have already used it in-session, when this next in-game day will take multiple sessions as well. It would be really useful to be able to tag my divination spells as used, since those two and a couple others have a changing rate of success after first use. Yeah, I could go in each time and edit the name or notes, but it'd be great to have something quicker (like a charge used when you click 'cast,' or clickable from the spell description in the sidebar, for those ritual uses). Hence why I'm also not interested in homebrewing single-use versions of the spells as a feat or anything.

Obviously this would be way far down the road, nothing approaching a priority, but I think it's got utility, especially if there are other similar uses I'm not thinking of.