Multitasking feature,2 apps running at the same time, touch id,it s really annoying to put the passcode, slo mo and more
Personally, TouchID is the only one of those features that I use on a regular basis. Not everyone needs every feature. If you just want an iPad for web browsing, reading, and social media, buying the latest model is overkill. It's not stupid to sacrifice some features that may not be important to you if it saves money. Why do you think there's a market for used devices? The Air 1 is still pretty popular on eBay.