How do you do P2P? There needs to be an intermediate. You can't just ask the rider to open up some port. They need to subscribe to a channel they both can commu

How do you do P2P? There needs to be an intermediate. You can't just ask the rider to open up some port. They need to subscribe to a channel they both can communicate over, so we are back to the server owned by Uber / Lyft. But I don't think this matters to end-users. As a frequent user, I only care whether the car will arrive on time and whether it is on the opposite side of where I am waiting...