Just gotta make sure you are doing a worthwhile upgrade. You can never assume anything giving tech help.
Like 10 years ago, games were still on single core engines. Anyways now, an oc i5 is still maxing games and not bottlenecking a 1080. Even an old sandy. Sure some current games will use more and i7 is better, no one said it wasn't, but the real question was value. Otherwise my original post stating an i7 would have ended this thread a long time ago.
You seem to be well informed enough to make your decision.