I doubt any phone battery is lasting 5+ years. But I can say modern iPhones are pretty easy to swap the battery on. They designed it so the back plate gets removed to open the phone rather than the screen. No more risk of cracking the display.
Just coming up to five years on mine and it is still at 87% capacity.
Big phones are overrated.
Really it mostly depends on how heavily you use it, and maybe to a lesser extent charging habits (charging slowly, not charging to 100%, etc).
Edit: I just googled it. Apple claims that the iphone 17 should handle 1000 full charge cycles before reaching 80% capacity
I also believe apple’s claim is assuming optimal conditions. Real life is going to do a fair bit worse. So likely 700-1000 cycles for 80% if the pattern holds up.
If you are using “needs replacing” to mean “the device will be non-functional or risk permanent damage”, you can go significantly lower than 80%. In fact, I think most devices could go down to 0% battery health unless the battery swells.
I follow the estimate that lipos lose 2-4% capacity per year without any use beyond recharging for safety. If the battery sees daily use that number gets a lot worse.
My guess is everyone else is the perfect mix of hardly any use and winning the battery lottery.
I'm not sure where the capacity will end up after 5 years, but I think my iPhone 14 pro was at less than 95% at this point. Apple refused to replace just the battery on that one because of a small crack in the screen.
The SE versions have a history of board level issues so I have been afraid to touch any of them.
I damaged my first iPhone repair even after multiple years of active hardware modification on other consumer devices. The older models really only go smooth if you have the Apple tools. A nice $149 of tool rental to swap the $50 part at home, rather than paying the $199 to get Apple to swap it for you. Odd how that math works out.