Single thread limited?
It's just really cpu limited. A 3700x you max 39.9 average and 25.3 1% with 8 physical cores. If you do 8/16 it drops by roughly a rame. 6/12 drops another frame on average and 4/8 drops you 3 frames and almost the same as 6/6.
It looks like it can't really utilize the full 8/16 cores of the cpu
Here is the 5800x3d in the first test it gets 48.7 average and 33.4 1% the i7 -12700kf gets 40.8/26.3 and the 5900x gets 37/29.5
second scene the 5800x3d gets 52.9/36.4 i7 gets 43.5/28.8 and the 5900 gets 40.2/29
third scene is 5800x3d 60.1/35.6 i7 48.9/25.5 and 5900 44.2/26.8
He also tests between 3.16 alpha and 3.17 alpha. 3.17 alpha gives much better frame rates. So in space his 5800x3d gives 104.4/67.6 and the 5900x gives 87.1/61.1 on 3.16. however on 3.17 it flips over to 5800x3d 174.5/103.1 and 96.9/59.1
So that extra cache is really do a lot of work here. However the cities still wreck cpus. The current consoles are going to be more similar to the 3700 in the first text. Of course the updates in 3.17 are going to give it more performance but you can see how bad it struggles
now they are switching over to a vulkan render and 3.17 is the first of those change overs. So more performance will come. I think depending on the refreshes they could get it running on those or maybe next gen consoles. I dunno will be tough to say
here is another good video with 3090s and 4090s
He points out that the space stations / planets are all cpu limited and space is all gpu limited with his chips ( 19 10900k and amd 7900x)