You might get better answers / discussion if you asked:

How has aging affected your intellectual capacity?

Referring to aging as a curse creates a bias. Furthermore, calling it a curse is false. Aging is a fact of life - at least at this point. Best to embrace it. Resistance is truly futile.

But to answer your original question: Aging has had some affect on my capacity. But what I've lost in quantity, I've gained at least 10x in quality.

I've also become, and perhaps this is personal, focused less (and less) on knowledge and fact, and more on understanding. That is, how things connect. What makes people - including myself - and systems "tick". It's enlightening, and certainly not a curse.