Some quotes:
Something that's definitely noticable though: it creeps up to 12GB of VRAM. Pretty sure the 3070 only has 8, so it resorts to putting a lot of resources into regular system memory which can completely destroy performance in some cases. A lot of newer AMD GPUs have 16GB of VRAM, so I can definitely see why this would be less of an issue on those.
My DXVK bug report: https://github.com/doitsujin/dxvk/issues/2990I strongly suspect this is a game bug. It creates a LOT of textures and never frees them.