Well I have somewhat oddball requirements when it comes to PC gaming and where my priorities lay, I mainly only game with emulators where CPU clockspeed & IPC are the absolute priority and only really need a mid-range GPU like a 1060 or 1070, even my current 970's can run most of my emulated games at a minimum 1440p and all the way up to 4K in most stuff.
..and its clear that the 8600K or the 8700K would be a far better, albeit far more expensive, choice for my needs, the extra cost I'm willing to accept because I only upgrade my PC's every 3-5yrs, so I will get my moneys worth out of the extra outlay.