I think people are just holding on to their devices longer. The mobile market is hitting that maturation point where people aren't upgrading the high-end models

I think people are just holding on to their devices longer. The mobile market is hitting that maturation point where people aren't upgrading the high-end models every 1-2 years, it's turning into more like the PCs, they'll upgrade every 3-5 years. I used to upgrade every two years but stopped that since I got my iPhone 5S, it's good enough for me. I didn't need anything until the battery life started to decline and when ATT had a good deal for two iPhones for price of one installment plan, I got an iPhone X. I would've stay on iPhone 5S for 5 years, no doubt. I suspect the same for X, I will be staying with it for 5 years.