I think the neuroscience here has really gone through the pop-sci wringer. The original research was specifically about impulse control and not anything else. I think there has been some more evidence about pattern recognition etc recently.

It's always struck me as funny when people say 25 is when you're fully mature. After this point, you start to experience declines in ability. It's not maturity; it's the moment you start dying.

Beware of unquantifiable words like "matures". It might just mean minor ongoing changes. Or it might even mean deterioration. In the end, performance is what matters, not morphology.