Understood, but you're making the case to dump Samsung and use Apple. Correct, apple owns all of those aspects and they've nailed battery life. It should not be head and shoulders above Samsung, though considering Samsung is their main competitor. Maybe you're right and it's impossible for Samsung to improve their battery life bc they are working w Android.OK, but Apple OWNS the OS as well as the hardware! It's like comparing Apples to Oranges...pun.
If Samsung OWNED Android they could probably do a little better at battery longevity as well as a few other things. Just to emphasize how hard it is to do what Apple is doing with a great advantage...look at Google who DOES OWN Android and still cannot seem to make a decent phone!