to #3 I think most people want to easily swap out their screen and batteries and maybe usb/lightning port. Those are the parts that usually wear out. I doubt an

to #3 I think most people want to easily swap out their screen and batteries and maybe usb/lightning port. Those are the parts that usually wear out. I doubt any expects to swap out the BGA and RAM other than maybe a professional tech who wants to do it for bragging rights.