Reality is here whether we like it or not - https://fred.stlouisfed.org/graph/?g=1DEP0

I help hire for a few clients as well as for my own small organization. We are already seeing impact of these tools on our hiring. For the same responsibilities and tasks we are already requiring lesser resources. For clients with less complex problems we are able to manage similar work with 60% of the resources planned. And that's when most of our work is mathematical modelling, heuristics, constraint programming and such. However, I don't foresee at least for the next few years we would ever get to a scenario where we don't hire developers. Given that most hiring has shifted to only senior developers.