I'm not sure about that. I noticed that some websites (even simple blogs) felt instantaneous when loading (after pressing enter or clicking a link), way much fa

I'm not sure about that. I noticed that some websites (even simple blogs) felt instantaneous when loading (after pressing enter or clicking a link), way much faster than other websites. So I opened the dev tools, and the first request was HTTP/3. But all resources were still loaded with HTTP/2! HTTP/3 really brings something not negligible. Those accumulating TCP/TLS handshakes (+WIFI high latency) are really a burden and degrade the user experience when you have a fast internet connection.