I usually keep my iPhones for a full 5 years and appreciate the fact that Apple provides me with system and security updates throughout the product's entire life. I am happy to pay the relatively high upfront cost to have a device that I can count on to work for me for half a decade without having to micromanage every little system decision along the way. Despite the limits imposed by physics, I truly appreciate the current state of battery technology - it has always been a rather black art to manage miniaturized mobile power, and have not forgotten what a luxury it is to have a pocket size computer always at the ready. I fully support Apple's power management decision with overloaded degraded batteries to slowdown my iPhone rather than to let it shutdown.