Same story with Nehalem... If you have a Core i7 970/980/990... You still have a beast of a chip... And they came out 6 years ago, overclocking one of them can put you ahead of even the Core i7 6700K in many situations.
The Core 2 Extreme QX9775 @ 3.6 - 3.8ghz is still capable of pretty much running every game out there... And that is 8 years old.
I still have a Sandy-Bridge-E 3930K in my secondary rig, it's still out-benches Intel's latest quad core chips, especially overclocked. (Where it will go farther than Haswell-E.)
CPU is just not that important for gaming anymore once you get a decent quaddy or better, the real gains are had in the GPU.
What I love about the Sandy Bridge chips is how much fun they were to overclock and how well they overclocked.
--::{PC Gaming Master Race}::--