WOW.
That is nothing short of stunning!
Oddly enough - Cumulus just launched a new AAA station earlier this year. Granted, it's in a non-PPM market.
http://www.thisisqmusic.com/
[The station is largely modeled after its successful 107One in Ann Arbor. John Dickey tried hard to ruin that station years ago by firing its popular morning host. The President of the Bank of Ann Arbor - who also served as U-M's Athletic Director for several years - soon after called John Dickey's office, said he would cancel all advertising (and encourage his fellow businessmen to do the same) if Martin Bandyke wasn't re-hired immediately, and guess what happened? Mr. Bandyke was rehired!! He remains the morning man at WQKL to this very day.]
Listeners in the Bay Area who like the mid tempo contemporary pop music that passes for "Alternative" these days can at least take some solace in the fact 104.5's demise will almost assuredly make 105.3 a more resilient station.