I would guess that Apple's margins are even higher on the 1/2 TB models with 16 GB than on the lesser models.This is your original quote: "Exactly. Apple is all about margins, they aren’t going to add more expensive RAM for no reason. This is part of why Apple doesn’t really advertise how much RAM iPhones and iPads have."
It starts off with some supposition/speculation. This makes the quote about ram seem logical, when in fact it's an opinion based on an opinion. Two opinions form a conclusion that is fact based? So I challenged those opinions about Apple being user experiential and not margin driven.