Yes, I am with you. But the first step for me was to get people off of Google Docs for collaborative writing, so a self-hosted Overleaf (pretty dumbed down, nothing compared to overleaf.com, no AI etc.) is a good start and people know the UI already.
I would very much like a git(annex)-backed stupid simple webinterface that regularly runs latexmk to build. Basically Overleaf though 😅