So I am currently using a Ryzen 3950x (with the threading hack), RTX 2080 super and 64gb of Ram and I've noticed over a space of an hour the frame rate hitches at points and then permantly stays lower. So it will go from 60fps to 40fps to 20fps over a long period of time. The only way to resolve this is to restart the game, and when the game loads up back to the same scene where the framerate was terrible it is now back to a normal 60fps. Has anyone else been getting this issue? I'm assuming it is due to a memory leak somewhere in the GPU video ram or general PC Ram. My hypothetical guess as being a dev myself. PS. Great game no matter what anyone says 
