QUIC was brought to the ietf for standardization and they decided to separate the transport protocol from the application protocol and potentially support other

QUIC was brought to the ietf for standardization and they decided to separate the transport protocol from the application protocol and potentially support other application protocols over quic in the future, resulting in http3 becoming a separate spec. https://quicwg.org/base-drafts/draft-ietf-quic-http.html https://quicwg.org/base-drafts/draft-ietf-quic-http.html