Alzheimer's. Amnesia. Generally, forgetting.
I don't want to forget people who made me laugh and spent a good time with, neither do I want to forget or lose cognitive skills like vocabulary and pun jokes.
Not just for myself, but people I like/love. The inconvenience and grief that come along with "poof where is this" and "huh wut how does this work again" and "do i know u".
It's scary, and highly inescapable.