So iOS 9 is focusing on stability and optimisation. This is what we've all heard. But I've been wondering what the actual meaning of that word is. At first I thought it meant that it was just making memory more manageable, and that sort of stuff. But then it could mean optimising each individual device to its needs. Optimising the iPads bigger screen. Optimising the 6 plus bigger screen. But what I think is most important is optimising the newer devices. It seems stupid how an iPad 2 from 2011 runs the same software as an iPad Air 2. What I've noticed is that don't add any new software features until they can add them to all the supported devices. We're paying loads of extra money for a device which is essentially the same, and the main differences only come in 2-4 years.