I go to the Discord when I have questions, because there’s so much that the wiki doesn’t cover. The “common problems and solutions” page has one problem with one possible solution.
The terminology dictionary covers MSD breakdown, which is super useful, but how about the abbreviations on the clear page? Things like FC (Full clear) SDG (Who knows) MF (What?)
Getting started and options guide are decent, but there’s tons of keyboard shortcuts that aren’t explained. CTRL+F to favorite a song, for example. I know there’s a way to add a song to a playlist too, but I can’t remember that one. I’ve seen Etienne changing the song speed from the song selection screen on the fly via keyboard shortcut, instead of from the options screen, but damned if I know how to do that.
How about all the different /slash commands available in the multiplayer server?
Personally, that’s why I don’t go to the Wiki.