You can get some of this speed back with HTTP/3 0-RTT start, and use 103 Early Hints to make browsers preload assets early. This combo has an advantage of being

You can get some of this speed back with HTTP/3 0-RTT start, and use 103 Early Hints to make browsers preload assets early. This combo has an advantage of being semantically backwards-compatible with HTTP/1 (reverse proxies, load balancers).