^^^ yeah we run asyncio http for non-prefect via a multiprocessing setup -- multiple processes, quart instead of flask, etc -- b/c of ^^^. so it matters as soon as you have parallel latency-sensitive tasks. without, something like a pandas call on main thread will kill avg session latency, even if not for an indiv request. but no idea wrt prefect; we were advised to batch tasks to 30s-1min level so don't care as much here.