Comment by joantune

The intensity you did it though matters. You probably didn't spend that many years on a specific sport for instance.

And when we're talking about sports, genetics matter as well (depending on each one)

When we're talking brains, while genetics also matter, assuming normal (whatever that is) brain, the plasticity changes a lot how it operates.

So, the 10 years thing is definitely a big if not the biggest part. In my opinion. Would love to see studies if any exist out there on this