At around 40, I'm now learning things like math quicker, but then I forget them a year later, whereas the things I learned in college I still remember now.
Is this normal, I wonder?
You might say, well, if you're forgetting them a year later then you didn't really learn them, but I disagree. I feel more complete mastery of a subject matter more now than I did in my teens. No, I forget things I learn much more quickly now, and the only way to not forget them is to practice them at least each week, and that rapidly becomes a time sink.
Is this normal, I wonder?
You might say, well, if you're forgetting them a year later then you didn't really learn them, but I disagree. I feel more complete mastery of a subject matter more now than I did in my teens. No, I forget things I learn much more quickly now, and the only way to not forget them is to practice them at least each week, and that rapidly becomes a time sink.