So I'm in the "MCP is probably not a great idea" camp but I couldn't say "this is how it SHOULD be done", and the author makes great criticisms but falls short of actual suggestions. I'm assuming the author is not seriously recommending we go back to SOAP and I've never heard of CORBA. I've heard of gRPC but I can't tell if the author is saying it is good or bad.

Also Erlang uses RPCs for pretty much all "synchronous" interactions but it's pretty minimal in terms of ceremony. Seems pretty reliable.

So this is a serious question because hand rolling "40 years" of best practices seems hard, what should we be using for RPC?