As someone approaching mid 40s..

Is Apple screen enlargement over the years just matching the aging eyes of their core demographics? Close focal vision degrades, hold phone further, bigger phone useful.

Kind of like the stat how burning man is getting older every year cuz its mostly the same GenX cohort going since forever...

Screen size would have always been big, absent production costs and marketing price. Over time display tech just got better and cheaper to finally do it.

I would think it has far more to do with content consumption than it does eyesight.