Hi ! I'm currently sitting on late 2013 rMBP, maxed out (2,6 Ghz, 16GB, 1TB SSD), and generally, the computer is still OK, but I feel like 4 years is enough. I am using it daily, sometimes including weekends, around 8-12 hours (yes, owning a company is a b***). Battery is week, around 75% now. Workload itself is not big, I'm handling big excel files + emails, sometimes gaming (well, not that much, since 750m is outdated). What I need to add is that I travel a lot, 2 times per week @Airplane and battery life + weight is an important factor for me. Do you think it's worthwhile to change to maxed out 2017 and stick with it for next 4 years, or just forget the gorgeous design and use what I have now ? If I switch, I will definitely be wanting to use eGPU, as I have a GTX1080 somewhere around that's not used (and selling my Alienware R4 17).