The NATS philosophy on guaranteed delivery is that delivery isn't what you care about, its the action taken as a result of delivery. If the far end system rece

The NATS philosophy on guaranteed delivery is that delivery isn't what you care about, its the action taken as a result of delivery. If the far end system receives your request but crashes before processing it, was it really received? The business logic of most applications requires end-to-end acknowledgement of transactions, so NATS considers that an application problem. (Disclaimer: I work for Apcera)