[ryannielsen]

You could also argue that, given the current success of iOS and Mac, Cocoa isn't a significant hinderance to Apple's platform's success.

(Not to say I wouldn't mind some significant advancements in Apple's preferred runtime, but there's strong evidence that the current runtime is actually quite suitable. If, as you say, .NET is only now starting to look good after a decade's worth of work, perhaps that wasn't the wisest investment on MS's part. Siracusa's been beating this drum for years and, like many of his crusades, I struggle to see how Apple suffers from not following his advice.)