If we did this, would y'all be okay with something like I've done with unlocking challengers or transforming items, just adding at the end of a description "ADDED IN YEAR:" or something to that effect?

People have pointed out before, adding more things to the actual hover of an item slow a little bit more because it's pulling even more queries. It'd be tedious, but I wouldn't mind going back and adding something to the description of an item itself, though. :)

I wonder where would be a good place to advertise that specific bit of custom CSS for those that want to use it. 👀

Also yeah, that's why it's not a separate field on the hovers. Adding to description doesn't do more harm since it's already pulling the description.