TCP makes NAT traversal harder, not easier. WebRTC can be peer to peer thanks to its use of UDP, not in spite of it. The complications of STUN comes from NAT, n

TCP makes NAT traversal harder, not easier. WebRTC can be peer to peer thanks to its use of UDP, not in spite of it. The complications of STUN comes from NAT, not from UDP. The complications of TURN comes from firewalls (or overly restrictive (i.e bad) NATs), not from UDP.