DX12 is smoother than DX11 after SU10. But Canadian cities with expanded photogrammetry in WU11 cause incremental lags and pauses when flying low.
But I get Limited by GPU with DX12 (Limited by CPU with DX11)… My system specs are in my profile.
But I must admit I have high graphic settings (here):
However, now I am on DX12 / TAA