That might be the case, but HTTP/3 is supported by most major CDNs and browsers. It has been adopted already. Also, if this blog post from 2020 is correct, per

That might be the case, but HTTP/3 is supported by most major CDNs and browsers. It has been adopted already. Also, if this blog post from 2020 is correct, performance per buck isn't that bad with some teaks: https://www.fastly.com/blog/measuring-quic-vs-tcp-computational-efficiency https://www.fastly.com/blog/measuring-quic-vs-tcp-computatio... I assume things have evolved since 2020.