I expected this thread much early, now he is alive 
… the first people got here 3080 and thought all would be better.
Now I own an 2080Ti and noticed “long ago” that the main perf-gap is not the GraKa, it’s just one single thread… strange is, it is allways the same Core which runs in 100% ( I expect at least a cycle , but each time same core ). ( i8700k )
My assumption is, it is just because of dx11 and we have to wait till they made the switch to dx12. I spend better no words about why they give us a so called final release with DX11 ( unbelivable if we know who is master of these directx stuff … ). In other flight sim’s it was a huge different in DX11 vs DX12 and or Vulcan… and the newest on the market… ah, I would not spend some words 
I hope they can stay in time with this switch, other flight sims struggled bit with the change…