There are places where it'd be useful, no doubt about that. Mainly it will be really useful in the cases where you want to ask a client something "synchronously

There are places where it'd be useful, no doubt about that. Mainly it will be really useful in the cases where you want to ask a client something "synchronously". For example it'll make doing things like asking a language client where function boundaries are much nicer than the way I was going to have to do it before (waiting for events to be triggered async-style).