I think it’s almost only because of an increasing amount of people using phones as their main multimedia and productivity device, hence the need for larger screens.

Such a shame, because battery aside (which is supposedly better in the 13), it’s still the most enjoyable phone I’ve had in a very long time. The size is extremely convenient for me and I believe iOS works best at this display size; even the home screen on an iPhone Pro Max shows the same amount of information as my Mini and likewise for the status bar (except for the models with a “Dynamic Island”).