Might also due to protect the screen from damage/burn-in and therefore it’s not possible to let it run longer with this max brightness.I am not a fan of the 15 and 16 pros with the higher brightness in the sun being readable for about 3 minutes then it does its automatic screen darkening. I get that the phone gets hot and the battery is pushing but I'd like to be able to decide when I need the screen to darken even if it eats through the battery. Now, if there is a setting I have on that I'm too much of a numbskull to change, that's on me.