I accidentally came across this project while playing with gRPC(Protobuf, more specifically: https://stackoverflow.com/questions/29687243/protobuf-rpc-service-method-without-parameters/29706593). I'll way its schema is more expressive, and maybe overall it's more advanced. Except curious about the way it works, my biggest interest is about how CapnProto is used in a real-world project? (the sandstorm case is the only one I can google out) And any comments on CapeProto?

BTW, There's another old critique (https://news.ycombinator.com/item?id=14824477) about CapnProto already.

Actually I'm using gRPC for my RPC binding of SEAL(a homomorphic encryption library), it's will be nice to see if there's something better than gRPC.