I agree with you, but I wonder how much of this is that most of us are worked to our last nerve until we’re at least 65, so many of us don’t have the luxury to maintain our brain plasticity? Once we’re 70ish, if we didn’t have that opportunity when we were living hand-to-mouth, and our brains are kind of set by that point.

We all have the potential, but not the opportunity until it’s kind of too late?