WebTransport/H2 is intended as a fallback for users that aren't able to establish a QUIC connection (most likely due to UDP blocking). It layers a WebTransport session over a single HTTP/2 stream.
Since this is just a fallback, this is only worth our time if / once the following hold true:
WebTransport/H3 is relied on by many users of libp2p.
Current draft: https://datatracker.ietf.org/doc/draft-ietf-webtrans-http2/.
WebTransport/H2 is intended as a fallback for users that aren't able to establish a QUIC connection (most likely due to UDP blocking). It layers a WebTransport session over a single HTTP/2 stream.
Since this is just a fallback, this is only worth our time if / once the following hold true: