Typing this on a 13"/1.86GHz/128GB/4GB machine. It still works fine for the most part, but has slowed down a bit in recent times. I also bought a Surface Pro 4 recently thinking it will help me be more productive, but I just can't get used to the detachable keyboard and the kickstand. It just doesn't feel stable or secure as a laptop. I have to baby the SP4 because I constantly fear I will drop it. Using the SP4 also made me realize how much I like the 13.3" screen size. The 12.3" screen on the SP4 just feels too cramped. So getting the new 2016 MacBook for my next machine is out of the question. So now I am hoping WWDC brings some much needed upgrades to the MBA or MBP line so that I can finally upgrade.