square-ish edges (easier to hold), better & larger LCD displays within the same body size, and powerful internals.
The new iphones are just too big for one-handed use. you want to type the name of the website on top bar of mobile Safari - bring the next hand out or drop your phone....
It costs a lot less than the current models, supports all the functionality I currently need, and more importantly I can use it comfortably with one hand only.
This is not a great solution, but in "Accessibility Options" you can enable the gesture to swipe down on the bottom to bring the top of the screen down to the middle so you can reach it one handed. It's clunky but helpful.
It's the functionality that used to be on a double tap of the home button or something, and I thought it was removed, but it was just turned off by default.
I can see if the phone is the only compute device you have, which is true for lots of people, then you might want to deal with the larger screen because you are watching videos on it and what not.
And it’s cheaper