Even if a 2016 Mitsubishi Lancer was thousands less wouldn't you rather spend more for a 2016 Honda Civic? The Lancer gets the job done, but its terribly outdated and inefficient by comparison. That's a reasonable analogy to an FX vs. i5. If it meant saving another month or two I'd do it.
Yes, that is precisely what I am saying (and Mitsu does sell thousands of Lancers...). The thing with cars is that the costs of operating can be substantially different.
For non-datacenter uses, I don't believe the costs of operating a CPU really add up to a hill of beans for the vast majority of users. Here is the honest truth, I used strictly my laptop that maxes out at ~40 watts power use in my testing for a solid six weeks vs. my very power hungry desktop. My energy bills really didn't reflect any tangible difference.
I'm just not one to get overly involved arguing 60FPS vs. 50FPS, or 70 watts of power use vs. 120 watts of power use. It's all crumbs to me. I have been logging lots of gaming hours on my machine lately (addicted to Grim Dawn) and simply enjoy gaming on it. When I am immersed in a good game, I don't think about my hardware, I just game.
I already said I'd be hard pressed to build a system today around AM3+, but if it is a great deal and will do what I need for now and the future, it could be considered in some situations. I prefer actual real life use vs. arguing benchmarks, and I'm not at all unhappy with the performance of my system. When it starts chugging in a game I play, I'll think about upgrading.