That is in fact what I meant to say, and I thought I said it. Anyway, HTTP/1.1 is still in use a lot of places.

I think most people here don’t have any experience building for the kind of use cases I’m considering here (imagine a proxy like Envoy, which btw does give you at least the option to configure header casing transformations). When you have customers that can’t be forced to behave in a certain way up/down stream, you have to deal with this kind of stuff.