Severe performance issue on day one is most likely a bug, some incompatibility, or debug code accidentally left in.
I don’t know why people interpret it as if the game will never be playable and behave as if it was some master plan to make 4090 look slow.
This is literally a huge pile of batteries that can charge at any rate at any time. It can soak the noon peak of solar, it can sip late night wind.