While phrased weirdly, I think we can assume he is asking us to support the experimental ESNI TLS extension (https://tools.ietf.org/html/draft-ietf-tls-esni-01).
The feature may have interesting implications related to state censorship of Wikipedia.
I'm not really familiar with the QUIC protocol/upcoming HTTP/3 stuff, but i think that's a rather separate request. I think that QUIC is still using TLS, so still uses normal SNI (or eventually ESNI)
The swap of Traffic for Traffic-Icebox in this ticket's set of tags was based on a bulk action for all tickets that aren't are neither part of our current planned work nor clearly a recent, higher-priority emergent issue. This is simply one step in a larger task cleanup effort. Further triage of these tickets (and especially, organizing future potential project ideas from them into a new medium) will occur afterwards! For more detail, have a look at the extended explanation on the main page of Traffic-Icebox . Thank you!