Straight Edge Softcore

Is that an oxymoron? With a sound fairly remenisicent of the Postal Service, PlayRadioPlay has a nice mellow electronica sound. The band is just made up of one guy, Dan, who has claimed Edge since 04. Some of his music reflects on his past drug abuse. Apparently he had been sent to rehab and came out Edge. I haven't really checked out all his lyrics yet to see what kind of SxE meanings may exist; but I wonder as more musicians claim edge outside of Hardcore will they feel the need to scribe lyrics of their drug free life? Do they understand what it means to be Edge?