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.
I'm so glad steam hired this guy cause if he was doing this sh*t to cover slack for Bethesda and the huge publishers all for just a personal side project I would lose any hope I had for humanity.