I've been using Macs since about 10 years old -- my first was a Performa 400 hand-me-down. Over the years I've owned just about everything... dozens of desktops, iMacs, Macbooks, even owned a friggen StarMax. My point is, there has always been a good reason to upgrade every couple years, at a minimum. Now I've been using the same MBP mid-2012 for almost 4 years. As much as I want an excuse to upgrade, every time I look there have been only marginal enhancements. My 15" MBP has 2.3ghz i7, 16GB Ram, and 1TB SSD -- similar on specs to current models, right? I like the internal DVD drive, and I don't really care about the retina display. Amazingly it even has 1173 cycles and has 90% battery health according to the app, so can't use that as an excuse to upgrade. My question is, am I missing a good reason to upgrade? Have advancements in technology really leveled out? I even chatted with Apple sales and they really had no good reason to buy a new MPB other than "turbo boost." Is there a new generation of MBPs on the horizon, with significant changes? Thanks for any input.