iPhone battery scandal has nothing to do with upgradability, it’s a story of cutthroat design power margin and bad quality battery. [br]
Apple’s recent Mac product strategy has gone to s h i t, evident in pathological obsession with thinness to the point of compromising product reliability, misguided pricing strategy and so on. Not able to upgrade the device probably comes from attempting to make the device thinner and some market research that most people don’t bother to upgrade their devices (which is dead wrong for prosumers) and attempts to make integrated secure storage that works great in securing personal data, but not so great when trying to upgrade or recover lost data. [br]
Overall this is a very complex business class topic that could probably fill a whole course, you can’t expect a forum reply to cover all aspects.