As we have just seen, discord is the backbone of the entire project, literally nothing works without it.
Can I suggest that Sonobus is used as a backup. It is p2p so it can’t break, and (iirc) it doesn’t need port forwards, so collab partners can just use the phone app .etc in a password locked session.
It is however missing encryption and echo cancellation, which may be a dealbreaker for this big of a project.
Just a suggestion.

