LOD at 9 = 22.5 GB of VRAM usage on 3090

… I would beg to differ on this. More RAM usage should translate into less data transfer (in certain cases) and that will always result in better performance. I tried to outline this in a different thread recently:

Now if “performance” means “FPS while maintaining the same, slow moving, camera context” then a RAM increase might have zero impact. But especially the switching between the aircraft and the drone can benefit dramatically from more (V)RAM usage.