Thank you for openly discussing this. Ralith has mostly responded in terms of the API our quinn-proto offers; it seems like you and/or ghedo may have missed that?

I just also wanted to respond to this:

> nor would they likely be able to add the interfaces we need in a reasonable timescale, nor would they likely tolerate our requests to do so.

I have a pretty different perspective on this: I've offered opportunities for collaboration from the moment ghedo started quiche in his free time, and explicitly offered to make changes to quinn{,-proto} to be able to do the kind of things that you might need when it was clear Cloudflare would be adopting quiche as well.

As an example, I mentioned making our TLS implementation pluggable, something we started doing anyway over the past week (see https://github.com/djc/quinn/pull/211 and https://github.com/djc/quinn/pull/218).