Market share again… Tell me, what's the point of market share? See there: http://tech.fortune.cnn.com/2010/10/30/iphone-4-of-market-50...
Apple won't ever have 100% or 80% percent of industry profits, so going after market share would only mean decreasing margin. I doubt they want that.
Now, another argument is "developer go where market share is". Again, market share of the devices, or market share of profits made from apps?
And there is another question of developing for the zoo of phones instead of
4 models, of which only most recent matter most.