I know stations like Earth are the exception, but there is one place corporate radio still takes risks --- on translators. Both Chuck-FM and, particularly, X98.5, probably wouldn't have ever seen the light of day in GSP without translators (which are, I think, a nice even if unintended side-effect of HD radio). Chuck's variety hits format died when it was Charlie-FM on a main signal (albeit also skewing a bit younger in the playlist). And I don't think Alternative would have made it into the market.
Now, the unfortunate part of that is that most of the time, these stations don't have any on-air personalities so it doesn't help talent or localzation. It's really not that much different than Pandora.