If you want to double the framerate you are getting with a 1080 and be on one physical card, with reasonable power and heat, that is the 2080ti.
If you ignore the ray tracing and machine learning features, this is still what you're asking for, is it not?
Or do you mean, you want to pay the cost of a 1080, and get a card twice as good as a 1080? Because i would also love to trade my leaf for a tesla but pay nothing...
And sure, I want to Moore's Law pricing overall. Even if each generation is twice the power of the last generation, I still want each generation at the same price. But again, only with competition.
or perhaps you're right and it's divide and conquer plain and simple.
SLI/CF never scaled linearly and in modern games (if they support it at all) you're usually looking at 10-30 % performance increase, for twice the cost and introducing microstuttering.
But it's in my interest to want maximum bang for my buck and it's in Nvidia's interest to extract maximum money from it's customers. The only escape would be if AMD comes up with an equivalently powerful card and I haven't seen an indication of this happening.
But yeah, it's hard to see them at any risk unless they really mismanaged their capital investment, which is always a risk for companies like this.