On paper the MBA 15" makes no sense, but in real life it's just a phenomenal "medium-grade office/programming work" portable machine. It has more than enough horsepower for everything except lengthy (10+ minutes, I would guess) continuous full-bore number crunching (even then I think it just gets hotter and throttles to 80%). The display tech of the MBP yields no benefits for office work (promotion is pretty but distracting, miniLED is a nightmare in low light), whereas the larger display of the MBA yields substantial benefits for spreadsheets, side by side editing, etc. I don't really know who XDR on the MBP is for -- I don't like consuming media on laptops anyway as I find a keyboard distracting, I have iPads and a television for that. And the .3 pound weight difference with the MBP 14 *is* noticeable, especially with the weight distributed over a larger area -- the MBA 15 is as easy to grab one handed and sling under my arm as the MBA 13. Aside from missing a thunderbolt port on the right, the machine is just eminently practical.