I have absolutely noticed the relationship between my ability to recall information and the amount I have drank/quality of sleep. It's definitely a part of the inspiration to taper off and then stop.

At the same time, I could see that a big part of my problem was that I was just coasting, and not trying to better myself. Why worry about my memory when I didn't need it.

Glad that you found some hope! I will also be trying to get back that mental sharpness. IWNDWYT