The funnest part of outputting JSON from the query is that your API now basically becomes a RPC, as you don't have to do any marshalling/deserialization before returning the response with Content-Type application/json

Response times are really fast like that, as you probably already know. Always fun to see <10ms round trips in the browser network tab on some requests

Also no worry about n+1 queries, as they're fundamentally impossible to do like that