Did you not finish the rest of the post? Yes, it's true that compressed json is not materially different in size vs protobufs. But when it comes to the speed

Did you not finish the rest of the post? Yes, it's true that compressed json is not materially different in size vs protobufs. But when it comes to the speed of serializing and deserializing protobufs there is a huge gain across languages. So if you're using gRPC in backend environments you'll gain huge speed benefits.