iPhone X for me. Bought in mid-2018, got a new battery in late 2022. I'll probably keep it for another year or two. The reasons I'll eventually upgrade are: 1

iPhone X for me. Bought in mid-2018, got a new battery in late 2022. I'll probably keep it for another year or two. The reasons I'll eventually upgrade are: 1. I would like a better camera. iPhone X was before iPhone cameras had good low light performance. 2. The older I get the more I could use a larger screen. 3. It cannot run the latest iOS. There's not much I directly need the latest iOS for. I think there are some passkey things that don't work on mine, but it does have some passkey support, which is mostly good enough currently. 4. I cannot upgrade my Series 4 Apple watch to the latest WatchOS. The latest WatchOS requires iOS 17+. And new watches ship with the latest WatchOS so a phone upgrade will be necessary if I ever want a new watch. I expect that the next time I get an iPhone its camera will be good enough that "better camera" will never again be a reason for me to update. I think they have reached the point where the cameras are better than any camera I will personally ever need.