2.
It mentions QUIC, and links to the XEP, but I don't see a way to
indicate a QUIC connection?
Maybe because QUIC is still experimental, so probably not ready to be
enshrined in an RFC, especially with WT coming.
QUIC was published as RFC 9000 almost 3 years ago. [1] HTTP/3 (which
goes over QUIC) is perhaps 30% of traffic at major websites. I'm not
sure I would call it truly experimental at this point.
Peter
[1]