huitema, I was carried over when discussing a proposal to revive IPv6 packet fragmentation on the IETF IPv6 mailing list, posting more and more details about QUIC performance and why fragmentation would not help. So I finally collected these arguments into a presentation of what we did to improve the performance of QUIC implementations, and wrote them in a new blog:
https://www.privateoctopus.com/2023/12/12/quic-performance.html