[WaltPurvis]

It would be good to explain (perhaps in a blog post) why this is useful. It's not obvious to me.

Neither the syntax nor build process for protocol buffers has ever seemed particularly difficult.

You mentioned something about cognitive load, but even as a Go developer this looks like it would add to my cognitive load. I have to learn/remember this new syntax and learn/remember the (imperfect) ways in which it maps to protocol buffers, etc.

I could really use some concrete examples of the ways this is better.