Interesting point. For example, Web apps cannot speak BitTorrent (because Web apps are not allowed to use TCP) but they can speak WebTorrent over WebRTC and nat

Interesting point. For example, Web apps cannot speak BitTorrent (because Web apps are not allowed to use TCP) but they can speak WebTorrent over WebRTC and native apps can also speak WebTorrent. So in some sense a protocol that runs over WebSockets/WebRTC is superior because Web apps and native apps can speak it.