I can understand AMD not actively working on this solution since it gains them little while costing a hefty amount of developer time. Especially considering the

I can understand AMD not actively working on this solution since it gains them little while costing a hefty amount of developer time. Especially considering the fact that nVidia will be able to arbitrarily break this implementation with every update. What I don't understand is why they would take it down completely, is there some safety concern or are we in the 11 competing standards xkcd again?