What problem are you trying to solve? gRPC uses protocol buffers, which had the goal of being smaller and faster to parse than XML. The issue it was trying to

What problem are you trying to solve? gRPC uses protocol buffers, which had the goal of being smaller and faster to parse than XML. The issue it was trying to fix was the performance of XML. The JSON-RPC protocol itself doesn't seem to solve anything that the other options don't solve as well.