Please, read this before commenting: https://en.wikipedia.org/wiki/Mobile_DDR https://en.wikipedia.org/wiki/Mobile_DDR XPS 15 uses DDR4, is even thinner if pos

Please, read this before commenting: https://en.wikipedia.org/wiki/Mobile_DDR https://en.wikipedia.org/wiki/Mobile_DDR XPS 15 uses DDR4, is even thinner if possible than the MBP and has less than 4 hours of battery. IMO MBP should be performance focused, being battery life a secondary concern, while keeping MBA as an ultrabook.