Yes, this is a very important point. One more very annoying shortcoming is that you can define a union of types and return them when queried, but you cannot wr

Yes, this is a very important point. One more very annoying shortcoming is that you can define a union of types and return them when queried, but you cannot write a mutation and ask the client to send the exact same union. You'll have to create different standalone mutations. In general the typesystem is quite lacking. But then again, it's better than pretty much everything else language-agnostic out there.