Soldato
As someone who has owned both Coffee Lake and Ryzen, and a 1440p G-Sync monitor, I can't agree with your assertion. Indeed, the reason I still have my "placeholder" 1600 is entirely because I didn't notice this supposed gulf in performance. And indeed even taking subjective and perceived experience out of the equation, my overclocked 1080 Ti taps out long before the CPU does in anything remotely demanding, as measured objectively by MSI Afterburner's OSD. In terms of stuff I have installed right now that can make decent use of a 1080 Ti - Far Cry 5, Assassin's Creed: Origins, Watch Dogs 2, Mirror's Edge: Catalyst, Deus Ex: Mankind Divided, Quantum Break, Mass Effect: Andromeda - my GPU is pegged at 100%, which means I have nothing to gain from throwing more CPU power at it.
Perhaps you could name some games where I'm apparently really missing out. I'll give you World of Warcraft, where a highly-clocked Intel CPU certainly does provide a notable benefit, though I feel that's a poor argument for buying an 8700K when an overclocked G3258 would provide the same benefit.
Destiny 2, gta5, world of warships, forza were the ones that come to my mind.