How many people would you need, in order to build robots? Not many, and most of it'll be automated anyways. And remember the birth rate is not 0.0 it's 0.8. So

How many people would you need, in order to build robots? Not many, and most of it'll be automated anyways. And remember the birth rate is not 0.0 it's 0.8. So I think fewer people will be there because we don't need more people. Society will change to accommodate to low birth rates.