It's a tradeoff. Most 20 somethings think they are better than they really are because they lack experience. Having decades of experience makes you better.
I'm 48, I'm definitely very much improved as a programmer and engineer relative to when I was 28. You think you know everything when you are 28. When you are 48, you realize you had a lot to learn back then. Anyway, I'll be doing this for at least another 30 or so years. As long as my brain works, I'll be using it.
The reason old people become slower is not necessarily that they are old but because they retire and stop using their brains. Not using your brain is bad for your brain. Age related deterioration is of course inevitable. But you can slow things down a lot by just keep on using it and staying active.
I'm 48, I'm definitely very much improved as a programmer and engineer relative to when I was 28. You think you know everything when you are 28. When you are 48, you realize you had a lot to learn back then. Anyway, I'll be doing this for at least another 30 or so years. As long as my brain works, I'll be using it.
The reason old people become slower is not necessarily that they are old but because they retire and stop using their brains. Not using your brain is bad for your brain. Age related deterioration is of course inevitable. But you can slow things down a lot by just keep on using it and staying active.