Playing now for about 15 hours and the game is getting more and more unplayable. Building two cars in front of junk yard and have just about 300 parts lying around. FPS drops to 15..30. GPU is doing nothing and on CPU one thread is @ >90%. Setting to 5 Ghz do not change the fps a lot.. (i9 k cpu, max 5.3 ghz). Set the render distance down, so it's almost playable.
Btw: unload all generated stuff @ junkyard when it's closed...looking in this direction makes the fps not better 😉