From the article: Why not SCTP-over-UDP SCTP is a reliable transport protocol with streams, and for WebRTC there are even existing implementations using it ov

From the article: Why not SCTP-over-UDP SCTP is a reliable transport protocol with streams, and for WebRTC there are even existing implementations using it over UDP. This was not deemed good enough as a QUIC alternative due to several reasons, including: SCTP does not fix the head-of-line-blocking problem for streams SCTP requires the number of streams to be decided at connection setup SCTP does not have a solid TLS/security story SCTP has a 4-way handshake, QUIC offers 0-RTT QUIC is a bytestream like TCP, SCTP is message-based QUIC connections can migrate between IP addresses but SCTP cannot