All of us are having the same experience, yet some people will tell you they never go below 60fps…
I have an i9900KF
RTX2070
32Gb ddr4
20fps on big airports, 18 fps inside the cockpit of the 787 and I can reach up to 60 with the external view around cities such as Madrid.
We discused the issue here: CPU Bug "Limited by Main Thread" is causing the bad FPS