This is a very succinct description of what Apple is trying to achieve. Imagine inside your laptop there are two boxes: the compute and the battery. You can get

This is a very succinct description of what Apple is trying to achieve. Imagine inside your laptop there are two boxes: the compute and the battery. You can get any of those swapped by Apple. Apple then takes care of the 2 remaining Rs on its own with the box you swapped. That's what Apple wants.