Having looked at the specs of the iPhone 6 vs the 5s, the RAM is exactly the same and the CPU/GPU speed differences are not all that great. It's the most insignificant change in a long time in iPhone's history. The A8 chip does not appear to do much that the A7 wasn't able to do. In addition, the screen size in the 6/6 plus is significantly larger, thus demanding more to keep it going. I'm thinking that in around 5 years time, the 5s, 6 and 6+ will all lose iOS support at the same time. What are your thoughts?