This is wonderful. I’m quite familiar with QUIC but hadn’t heard about this.

Nothing like waking up after 10 years, realize you now really need those bits, and 20 different routers from 10 brands have decided that those bits must be a certain way.

Bonus points for checksums/crypto that breaks on the other end if the bits have been messed with. Curse those middle-boxes and their “clever hacks”.