[ericpauley]

Judging by iOS version market share [1] at least 95% of iOS devices were produced in the past 6 years (as the older ones don't support iOS 16). Given apple's 2 billion installed device base a 6-year replacement cycle yields 333 ("repeating, of course") million devices per year. Of course, some of those aren't iPhones, but also 6 years is probably longer than most people's replacement cycle.

[1] https://gs.statcounter.com/ios-version-market-share/all/unit...