Michael Tsai (whose SpamSieve I used for a very long time) writes about his experience going from an iPhone SE to one of the newer iPhones. I currently use an SE, and this paragraph on the tradeoffs between physical size and screen space is particularly relevant:
I wasn’t sure whether I would like the size of the screen. With the iPhone SE, I could easily reach everything with one hand, and this wasn’t the case even with an iPhone 6s. The iPhone XR is quite a bit larger. In fact, I found that it’s so large that I hold and use it in a different—unapologetically two-handed—way, and the adjustment has been easy. Being able to see so much at once is an incredible advantage. I’ve long known this on the Mac, where I’ve always tried to get as much screen space as possible. But, in a way, it’s more true on the phone because it’s so cramped to begin with. Modern iOS and apps are less information dense than before, and they no longer seem to be optimized for 4-inch displays like when that was the flagship size. I miss those days, but at this point I don’t think even a new small phone would bring them back.
FWIW: I shifted from Android back to iOS to return to a smaller form factor, and that very same year Apple released the iPhone 6, inaugurating a new “standard” size for the iPhone. I am doubtful that we’ll see an update to the SE-class size.
But perhaps that isn’t something to mourn too deeply. As Om Malik notes while surveying the advent of foldable phones:
We have gone from voice to app-centric form factors. The next form factor will be multi-modal and very visual. A device that marries a wearable, a pocketable and a hearable could become the catalyst of the next shift. Let’s use Apple as an example. Imagine an Apple Watch, AirPods, and augmented reality (AR) glasses married to a phone serving as an edge server. That could be the next form factor, and who knows if we would even need the intermediate device.