AdExchanger’s podcast last week had an interview with LUMA Partners’ founder Terry Kawaja. You probably know a little about him because of his famously crowded LUMAscape slide, which features all the old-time ad tech companies that got a piece of the action between advertiser and publisher in the media buying business. You may notice that many of the companies on that slide are gone. And their demise has probably enriched Kawaja, who seems preternaturally able to spot trends.