I just wanted to try and start a discussion here to see if this is something suitable for this project, or if it is something more suited to another one?

In the browser HTTP/2 gets used opaquely - would be really nice to get the same experience in NodeJS to provide a unified experience, perhaps with just an opt-in flag for using the Node core support here.

I wonder what the technical hurdles would be faced with the API? I guess HTTP/2 doesn't have an "agent" interface the same way, but perhaps a userland agent wrapper could be created for HTTP/2, would that make sense? Apart from that what other API's may provide issues?