The open source part covers both those problems. If whatsapp respected user freedom, users could fork it and add metadata encryption to the system, and by the n

The open source part covers both those problems. If whatsapp respected user freedom, users could fork it and add metadata encryption to the system, and by the nature of forking and redistributing would create a network of similar apps. It doesn't stop whatsapp proper from being non-federated like XMPP or Matrix, so maybe that does deserve its own criteria.