Yep. And git can't at all handle realtime editing (since you'd need to commit & push after every keystroke). Or handle any non-text data. Even markdown, as you mentioned, can be a pain.

CRDTs should be able to solve all of these problems. One thing we're still missing in CRDTs is git style conflicts when merging long running branches. Should be possible - but still nobody has solved that as far as I know.