The Fields medal, the Nobel price for Mathematicians, exists already since decades and is only for people younger than 35. One point might be also that when you

The Fields medal, the Nobel price for Mathematicians, exists already since decades and is only for people younger than 35. One point might be also that when you learn more and more, you can do more things. I think in the past there seemed to be the thinking that learning too long would be counterproductive. That's still reflected by the fact that managers earn more on average than engineers.