I'm in the same boat. I have a 2012 rMBP and I am sticking with it instead of getting one of these new machines. They bring nothing to the table I care about.

I'm in the same boat. I have a 2012 rMBP and I am sticking with it instead of getting one of these new machines. They bring nothing to the table I care about. They have optimized for thinness and lightness where those should be nice bonuses on a machine focused on being a fantastic work machine for professional developers. Not a machine focused on being thin and light that developers can "make due" with.