I see the top asymptotic part of the curve being an Iain Banksian “Culture”. Very very far off, but at a certain point, maybe Kardashev II-III, there will be a

I see the top asymptotic part of the curve being an Iain Banksian “Culture”. Very very far off, but at a certain point, maybe Kardashev II-III, there will be a gradual plateau.