Today, companies have more customer data than they can handle. Like a digital version of the show Hoarders, companies try to keep every bit of detail for as long as possible with the hope that one day these useless bits can be turned into massive new revenue opportunities. Over the past five years, bright engineers have devised open-sourced solutions to store and process the data deluge. We now even have a “big data stack” — that is, a framework for commoditizing data.