But the whole point of async is that, after data is dispatched the client moves on. I'm not sure what NodeJS does with it but this is my interpretation of the c

But the whole point of async is that, after data is dispatched the client moves on. I'm not sure what NodeJS does with it but this is my interpretation of the concept. I don't think people who know what they are doing, use async calls for mission critical operations. If async call returns response and client is required to read the response it's no longer considered non-blocking from technical perspective.