I'd say the self reinforcing element is a bigger phone allows for a bigger battery and other bigger numbers. It's easier to market bigger numbers so that's what

I'd say the self reinforcing element is a bigger phone allows for a bigger battery and other bigger numbers. It's easier to market bigger numbers so that's what gets prioritised. Re consumer demand. Would most care? I would guess 50% of phone buyers only actually use basic functionality, but then those aren't the ones spending loads for the latest model, so that would seem to be more fashion/economics, rather than demand per se.