I am new to iOS, only got my IPad Air a few weeks ago as my first tablet. My smartphone has always been android based, and I currently own a HTC One S. I am happy about it, but as with android phones before it, you don't get many OS upgrades, and the various mandatory apps continue to grow in size after each update so you quickly run out of space. My question is by no mean an attempt to start yet another android vs iOS war, but noticing that the new iOS 8 is available all the way back to the iPhone 4s, I am beginning to think that iPhones might have a longer life expectancy. Is that a fair assessment?