A use case that I really like is as a sidecar on every EC2 instance for local async store-and-forward, where you need to deliver data somewhere, but want to be

A use case that I really like is as a sidecar on every EC2 instance for local async store-and-forward, where you need to deliver data somewhere, but want to be able to handle large bursts of traffic without a massive spike in latency. This use case assumes you generally don't trust the network and really, really don't want to block if the network is temporarily flaky.