Yes you do, you just aren't acknowledging them: centralized services like Whatsapp, Twitter, Facebook, Instagram, and so on. You are thinking of 'competing distributed technologies' but consumers are thinking of 'way to communicate with people' because most consumers do not care how the underlying technology works or what philosophical principles it is based on.

First movers in a market or technology space have an advantage because the costs of switching to something else rise over time, creating economic inelasticity. Go read up on preferential attachment and consider the fact that success is accidental or lucky as much as merit-based.