The issue is I've never being bothered until I had the 1070 as it was always used at 99%, it's just now with the 2080 that I'm seeing around 80% in many games.
I just wonder if even with Ryzen (given I would be at similar speeds for similar IPC) I would see the same usage. Although I guess more cores would smooth things out.
If you've a 2080 then you'll not be gaming on 1080p (which is what that graph shows) 2080 isn't really a card for 1080p.
You're around the 1440p to get the most from the 2080 I'd say. At that resolution the difference in games is negligible. Main thing too is price. AMD just smash INTEL with performance for money.