I’m running i9 10900K, 2080 Super and 32Gb RAM and getting 40+ FPS consistently everwhere with the odd drop to 35 in the bigger cities. If you look at my post (see link below), you can see my frame rate bottom right on most screen shots in green from the nVidia overlay. All game setttings on ultra, traffic, ground traffic, draw distance etc on 200. Live traffic on, but not multiplayer.
Using developer mode, shows that my GPU is limiting performance, not my CPU. It runs c. 40% (that is total package, I’ve not checked the cores separately) but developer mode tells you what the limiting area is. GPU is flat out 100% constantly - max temp 80 deg C, so my cooling is working 
Hope this helps.
Here is my thread with pics (look at the later posts for the frame rates - I was cutting it off in the earlier ones):