Su4 installed earlier this evening.
And...wow. What a difference.
Yes, I had to redo my settings, but it was definitely worth the effort.
I fly in VR, so the frame rate is never going above 100fps. The question has always been how to balance detail/visuals against a frame rate that might have big drops.
Previously, it looked fine at altitude, but low down, what a mess. Photogrammetry was worse than having it disabled, buildings looked melted and it still stuttered in cities. That's with a 5080/7800x3d.
Now, I was able to put the buildings to high and enable Photogrammetry. London actually looked like London, whilst maintaining a respectable frame rate, with very few stutters.
Great job by Asobo.