Earlier quoted context omitted.
Built in obsolescence?
Almost certainly. I try really hard to be as un-cynical as possible about this, but there's a great quote I heard from someone smart whose name I can't recall right now - economics is incentives all the way down - and it applies perfectly here I think. What possible incentive could any phone manufacturer have to build a phone that significantly over-lasts the rough 2 year cycle that their bulk buyers, i.e the network…
Consider it this way: the actual evidence we have disagrees with your conclusion. Apple has seemingly gone out of their way to ensure that new releases continue to run on increasingly-older generations of hardware. Look at calvin_c's comment[1] for a complete breakdown of this.