well, traditionally the reason you do an

IN

is because you want to ensure a single connection is used, and the data is loaded efficiently. With SpiceDB, on the other hand, making the calls in a goroutine will be close to ideal because (a) you're making them via gRPC, which will multiplex the calls across a single http/2 connection (b) SpiceDB is designed to process those requests in parallel and (c) the caching and single dispatch systems should reuse as many of the subproblem results as is reasonably possible