There was a small backlash about this a couple of years back when someone suggested dropping i686 support in the forums.
Apparently no one even noticed this time.
There's plenty of people offloading sandy bridge or newer systems at this point and they're dirt cheap, being that I live in Boise, ID the power savings of desktop components aren't terribly important to ME - but I realize I live in a little bubble when it comes to cheap electric rates.
I recently picked up a couple Ivy Bridge Core-i3 Dell Optiplex desktops for under $100 each to replace some older machines at work. Totally worth it, and they came with Win 7 Pro, which can still be upgraded for free to Win 10 Pro. I'd imagine by this time next year Haswell desktops will have fallen to the same price.
Which isn't related