The update added some old stuff I pushed ages ago. It includes a very old version of Core, the original Forgotten with the llama highway, and an updated version of Fallout with jumpads (was requested when PUGs were a thing). It also automatically records demos, instead of manually having to select Yes.
The issue with Quarry is that a number of lighting files were removed when they made the move to Legions: Overdrive for some reason. I mean, I could technically get it working by re-adding those files, but I don't really see the point. If there was some resurgence and by some weird reason people were rioting for Quarry I might look into it.