I'm not so worried about the present - I am 34 years old and expect the web to be around for the rest of my career. Consequently, if I can't recall facts today,

I'm not so worried about the present - I am 34 years old and expect the web to be around for the rest of my career. Consequently, if I can't recall facts today, who cares? From a professional point of view, I'm worth much more if I can think critically about facts than if I can remember them. However, I am very worried about the future. If we don't practice information retrieval, our ability to retrieve information should theoretically dim. When I am in my 60s/70s, am I going to be at increased risk for Alzheimer's disease (or Alzheimer's -esque symptoms)?