This is an interesting graph that can be studied a lot. I wonder just how accurate it is? It would be more interesting if the Y axis was actual numbers in the group instead of being apparently dimensionless.
Not part of the GG but still in a SW dev role at age 72. Still coding,learning new stuff and remembering stuff I used to know. Get up 5am and ride my GS into work every day. Hope I can stay working for another 20 years.