Let's say you have some amazing project that's going to require 100 Phd-years of work to carry out. In the present world that costs something like $1e7. In the post-AI world, that same amount of intelligence will cost $1e3, an enormous reduction in price. That might seem like a huge impact. BUT, if the project was so amazing, why couldn't you raise $1e7 to pursue it? Governments and VCs throw this kind of money around like corn-hole bags. So the number of actually-worthwhile projects that become feasible post-AI might actually be quite small.