Did you read Appendix C.1 of RFC 9460? It’s addressed in the very document. If implemented it can reduce time to first byte (it saves round trips to negotiate t

Did you read Appendix C.1 of RFC 9460? It’s addressed in the very document. If implemented it can reduce time to first byte (it saves round trips to negotiate the next protocol) and it can be retrofitted to existing protocols like HTTP. If this is implemented by most browsers the SNI reverse proxy only has to handle remaining load.