Questions about whole population groups like these are best understood not through stereotypes or anti-stereotypes but through statistics.
I found this study [0] that examines the relationship between age and things like winning the Nobel prize or coming up with a "great invention".
Looks like there's a peak in the late 30s and that peak is slowly creeping up as the population ages.
But it might also be that you need a population of 20-year-olds to actually adopt the new inventions.
[0] https://www.kellogg.northwestern.edu/faculty/jones-ben/htm/a...