I second going with the T line and would go as far to say that the T480 has a very modern feel to it. It is only slightly thicker than my old MBP 2013 retina 15 inch. (the thickness of the screen) I was expecting it to be much thicker and the fact that you can get 32 GB of RAM makes it feel like a very fast/responsive machine even with many applications running. Far more important in my opinion for a developer machine than having the screen of the Carbon.