Sort of confirm: I'm older, and my mind is fine, I just don't care as much anymore. I'm comfortably numb as the song goes.
Everything we personally do will mostly be forgotten in short order in basically all cases. Even the exceptions do little more than stretch out the timeline by a bit. Jeff Bezos of tomorrow will be the John Astor of today; many, if not most, young developers have never even heard of John Carmack. The only real legacy we can ever truly have is our children, because they will be the humanity of tomorrow.