i think Charlie got wrong on this one....
because richland never existed in any roadmap, and steamroller got delayed
I think Steamroller was probably done, as far as FEOL went. They just delayed it so that they could save on BEOL. Richland was an interesting addition - AMD wanted to play to there strengths better and someone must have done an analysis that showed it should pay off. This just confirms that GFL 28nm was maturing very slowly and AMD thought it needed something better to carry them through 2013. If Kaveri ships in 4Q13, then I doubt Richland will be in production long enough to pay for it's development. The unpredictability of GFL hurts AMD again.