IBOC, HD Radio, FM eXtra, DRM, Importers, Exporters, Exgines...digital radio spoken here!
When all is said and done, in Radio of all modes, Content is king. Programming so compelling, people want to listen to it. Badly enough they will buy an HD tuner or receiver is what it will take to get set penetration. And reliable, consistent HD reception. That Entercom HD2 Delta Blues format is for me a reason why I'd buy an HD tuner for myself. If there was an Entercom station nearby. A deep oldies, R&B Oldies, Jazz, Standards, Easy Listening, or other compelling option which has loyal listeners makes HD2 FM worthwhile to have. And the best use for HD2 is using it for minority formats which otherwise are not viable.