Also, what's valued by your social group, what kind of intellectual environment do you inhabit, and so on. Generally one could imagine a massive neural network

Also, what's valued by your social group, what kind of intellectual environment do you inhabit, and so on. Generally one could imagine a massive neural network and consider how effectively it's being trained... and how it's then being put to use. If you have 10% more neurons, that's cool, you might have more potential in the way that an elite bodybuilder probably has advantageous genetic factors for muscle growth or whatever. But it should reasonably be far from the dominating factor.