uhc got a big revival after hoplite released and the massive success that lava survival got on lifeboat being a uhc-esque gamemode would suggest that if made, a cubecraft custom made uhc would do numbers and could quite literally be insanely massive for the server.
(doesnt have to be solely a uhc, just really wanna see a game with a uhc element. and YES i know this was suggested before, that was like 2 years ago and times have changed)