I think they'll catch up because libwebrtc is huge and can't take advantage of most of the existing browser protocol stack. WebTransport is a pretty thin layer

I think they'll catch up because libwebrtc is huge and can't take advantage of most of the existing browser protocol stack. WebTransport is a pretty thin layer over HTTP3, which already gets used much more often than WebRTC's SCTP-over-DTLS ever will. Not to mention the fact that it takes like two orders of magnitude less code to implement WebTransport than the whole WebRTC stack.