I see a lot of comments here about planned obsolescence, and not updating OSs more than a generation or two beyond what the device shipped with because it "cripples" them, but I have to say that this doesn't seem consistent with what I've seen in my (admittedly limited) use of older iPads.
I found this video interesting in that it shows a 4 year old iPad 2 performing quite well on iOS 9.1. Doesn't keep up with an Air 2, obviously, but still quite usable.
I found this video interesting in that it shows a 4 year old iPad 2 performing quite well on iOS 9.1. Doesn't keep up with an Air 2, obviously, but still quite usable.