Looks like I'm going to be the guy to shout "correlation is not causation" today.

What if older brains decide to filter more, store less and this is reflected in the brainwave patterns? A young brain might go "accept accept accept accept...." whereas an older brain might go "accept reject reject accept reject...". I'm pretty happy about having forgotten a lot of stuff.

After all, the older you get, the more you have to throw out to accommodate new memories. And it's mostly trash. So why remember it over sweet youth?