Is it fair to say that the number of publicly accomplished multidisciplinaries alive at a particular moment is not rising as it may be expected, proportionally to the total number of suitably educated people?

Genius Edward Teller Describes 1950s Genius John Von Neumann

https://youtu.be/Oh31I1F2vds?t=189 Describes Von Neumann's final days struggle when he couldn't think. Thinking, an activity which he loved the most.

Euler.

JVM was one of the smartest ever, but Euler was there centuries before and shows up in so many places.

If I had a Time Machine I'd love to get those two together for a stiff drink and a banter.