I’ve actually been waiting for anyone to mention any rhythm games at all. I think rhythm games in general tend to have low skill floor, but insanely high skill ceilings (Freedom Dive, some Hatsune Miku songs, …), which make them an interesting case on the difficulty scale… Some rhythm games have unintuitive control too (OSU being a prime example with the mouse control, also Taiko series) which makes them even more difficult
Side note: I find it hilarious that the original game which OSU was based on was actually just a “tap a tablet” game though (Ouendan series, use stylus to click bottom screen of NDS)… also some JP arcades stock Reflec Beat and crossbeats Rev, Round1 has an exclusive game Tetote Connect, which are all “tap a button on the screen” games but you touch the screen with your hands instead
I agree, even the hardest non-rhythm games I seem to be able to get accustomed to in 50~100 hours, but not some of these monstrosities
I sure hope their recent heavy prosecution of the Invidious project isn’t related