There is no place for gRPC in NGINX.
This is Google trying to thin end of the wedge their own proprietary protocols into web standards yet again.
My idea of a good time is not a future where the internet is built using Google technologies dressed as "open technologies".. that.. uh-huh just happen to be the exact same as infrastructure protocols that span the internal Googleverse.
Besides that, protobuf and its ilk aren't even good or modern.
People who say, yay look at it growing are very naive imho