Cars and computers are made to last for a long time. Phones, not so much... They're more designed to be disposable, probably because people tend to break or lose their phones a lot. Also, new phone models are made constantly, making older models get outdated fairly quickly. I think the strategy they have there is they want people to buy new phones for cheaper regularly rather than get one phone for a lot of money and use it for a decade. That's how I see it, at least. I'm no expert.