Async is perfectly fine for a medium-load single-threaded RPC/REST server wrangling. Ran it in production with 100s, sometimes 1000s of calls / sec with no issu

Async is perfectly fine for a medium-load single-threaded RPC/REST server wrangling. Ran it in production with 100s, sometimes 1000s of calls / sec with no issues. And thread-safety is much easier with async, where you know where the context switches are occuring.