100% agree. Last week I took delivery of the 16 inch and am amazed by the few physical differences between it and my 2012 MBPr 15 inch.
It was really ahead of its time when it was released. My 16 inch feels more like a spec upgrade than a "newer" laptop. ?
The 2015 MPBr has been bullet proof and is the best quality and longest last product gadget that I have ever bought.
I disagree, it wasn't ahead of its time, it had all a laptop needs.
There isn't a lot of innovation over the last (8) years, Intel dropped the ball big time, most people get by on a laptop like the 2012 model, most don't need the extra 30% percent or so that CPU's got faster.
I am using a 2012 MM and a 2012 MBP(Non retina), both are more or less the same internally(Upgraded RAM and SSD), they chuck along, only minor inconvenience is the Graphic card, I can live with that.
The few things which got significantly faster is SSD and the Thunderbolt port, that's it.