"Needs 10GB VRAM for 900p". LOL. Every game Arkane have made with the Void Engine (Dishonored 2, Deathloop) has launched to complaints about performance. And every other highly rated well optimised games Arkane have made (Dishonored (Unreal 3), Prey (CryEngine 4), etc), have all been made on something not-Void. Should have just stuck with Unreal.
It does not need 10GB
8GB RTX 3070 beats 6700XT 12GB at 4K
and 8GB RTX 2080 beats 12GB RTX 3060
This sure looks like a terrible port, but it seems that it's nothing unusual for Arkane (not that I would know personally as I buy games months after release).
For how it looks, it should be running at at least twice the FPS it does now, not to mention that a lot of people are suffering from constant stuttering on top of all that.
Digital foundary has optimized setting guide for PC
Also, RTX 2070 Super performs better than PS5 version when using same settings.