@basvanhaastregt @albert_magellan @threemaapp
Peer-to-peer protocols may be more metadata resistant, but they usually come at a certain cost, (least at the moment), eg. offline messaging, large rooms etc, present challenging problems. status.im, cwtch.im, getsession.org are providing interesting research, though still early days.
Matrix is even having a go at P2P as well: https://matrix.org/blog/2020/06/02/introducing-p-2-p-matrix