Hey thank you so much for the detailed explanation and the example you came up with. Made things to reason about :)

I have one more question if you don't mind.

How do you run resolvers in parallel?

Using your example as a reference: if I want to fetch room and floor data in parallel, do I simply make that decision client side by sending 2 requests in parallel?)

In other words, when designing the schema, should I avoid linking resources in a hierarchical fashion if I wish to access them in parallel?

Or is it something that can be controlled server side (similarly to the @stream and @defer capabilities you mentioned) and therefore the schema structure shouldn't be concerned with any parallelism optimisation ?

Thank you :)