It hasnt flattened yet. And the question is when will it. But its stupif to think its exponential. These things just arent exponential. The first half of the s curve seems exponential and wishful thinking extrapolates from there

This is a very shallow point. The whole question is about where the S curve ends. Nobody claims that it will literally progress beyond all physical limits and number of atoms in the universe and beyond energy constraints contained in the universe and whatnot.