Hmm, interesting - looks like Chrome added support for the ORIGIN frame for HTTP/3 (eliminating the need for a DNS lookup before coalescing connections).
https://blog.chromium.org/2024/12/making-chrome-quicer.html
https://blog.chromium.org/2024/12/making-chrome-quicer.html
Comments
Not sure if there are any plans to enable it for HTTP/2 as well.