The data streaming world is saturated. There is a real cost associated with choosing between Spark, Flink, Akka, Heron/Storm, IBM Streams, Edgent, or even NodeRed — to the extent that its impossible to evaluate everything. Usually, developers start from the most commonly used framework and go down the list to evaluate how it plays.

A streaming framework can be kickass but see no real adoption because of this. Hopefully that isn’t what’s happening here, or why someone is posting to HN to ask “who’s using us and why?”