A prominent open-source dev publishes their findings as to what's going on with Starfield's performance, and it's pretty darn strange.
According to Hans-Kristian Arntzen, a prominent open-source developer working on Vkd3d, a DirectX 12 to Vulkan translation layer, Starfield is not interacting properly with graphics card drivers.
Bless my old pre-shortage 2070 S, medium on a 2K screen without any issues.
Maybe it’s because I’m only running at 1920x1080, but it runs fine for me on high settings.