128gb of flash storage is like $150 retail, probably less in bulk. 4gb RAM is not expensive, yeah it's integrated, but the reason why device manufacturers hold

128gb of flash storage is like $150 retail, probably less in bulk. 4gb RAM is not expensive, yeah it's integrated, but the reason why device manufacturers hold back is they're penny pinchers who are looking to maximise profit, and they're also running mobile OS'es that don't need 4gb.