I got myself the 2012 model shortly after it was introduced. Despite the obvious risk, I made an exception to the rule of never buying a 1st gen. It was simply everything I (until then) didn't know I wanted. A machine truly worthy of the Pro label, pushing the state of the art at a fair price. I was happy to spend my money.
Meanwhile we lost both the quality and the fair price. It really makes me feel sour, to the point that I just bought a new 2015 model only to have the warranty that I'll have a proper MBP for three years to come. It was no more than a contingency plan; a rational decision made out of a lack of options, involving no enthusiasm at all. During that period I'll either have to find a good alternative to switch away to, or – hopefully – Apple will introduce something new that will make me want to be their customer again. Honestly, I can't say I'm optimistic about either.
What I meant is that practically the only reason I upgraded* is that I don't want to risk my old one breaking when no pre-2016 model is available new from Apple anymore, which could be anytime soon. Now warranty assures me that for at least three years I'll be able to keep using the 2015 model. I can't switch to another platform all at once, or bet that my stuff won't stop working before Apple get their act together again. That's why the lack of options.
*This new one isn't really worse, nor is it much better. The biggest improvement is the SSD. No more dGPU is a loss in terms of performance but a win for durability and battery life. The screen has this weird thing that something inside slides when you shake or turn it on the side (https://youtu.be/HmL7KXCMfxU). Don't bother having it replaced because all have it to some extent. I suppose it doesn't affect anything but my quality perception. Everything else feels pretty much the same.
I'm thinking the OP meant that, when looking to upgrade, the 2015 model was the only choice left, due to the changes in the 2016 model. I'm guessing that because I came to a similar conclusion. My decision was a combination of the new design choices and price point - a refurb 2015 gave me more consistency with earlier models, while saving > $1000. There were/are positive aspects to the 2016 (I miss the touchid on the model I had for a couple weeks) but enough annoyances to make the question the value I was getting at that price point. My 2016 ended up being... $3700? Had it been, say, $2500, it would have been a no brainer to keep, even with some of the design drawbacks.
Meanwhile we lost both the quality and the fair price. It really makes me feel sour, to the point that I just bought a new 2015 model only to have the warranty that I'll have a proper MBP for three years to come. It was no more than a contingency plan; a rational decision made out of a lack of options, involving no enthusiasm at all. During that period I'll either have to find a good alternative to switch away to, or – hopefully – Apple will introduce something new that will make me want to be their customer again. Honestly, I can't say I'm optimistic about either.