Couple things: I would speculate power law is very task specific(aka 5 years of java development doesn't translate into 5 years of python development). Most t

Couple things: I would speculate power law is very task specific(aka 5 years of java development doesn't translate into 5 years of python development). Most task don't require that level of proficiency(aka crud apps) Geoffrey Hinton and Andrew Ng already have pretty well paying jobs are most companies willing to spend that kind of money? And I wouldn't hire them to optimize my database or something. If you wrote a library you are probably the one that is best at using it. Next would be people that go to conferences and training related to that product/library