> "Try a different smaller form factor every couple of years" is a reasonable strategy. First Mini, then Air.
The iPhone air has a 6.5" display. That's bigger than the base iPhone 17 (6.3") and the iPhone 17e (6.1")
You're probably thinking about the thinness of the phone. iPhone air is 2.4mm thinner than iPhone 17, but I don't think anyone is asking for that, as most people use a case which makes the phone thicker.
Yeah, it's smaller in a different way than the mini was small.
But the thinness isn't actually the appeal. The key thing is that it's a lot lighter. (And yes, a case adds weight as well as thickness. But if you start from a lower baseline, you still end up in a lower place.)