I can think of only one possible benefit of losing my mind: I'd no longer worry about misplaced apostrophes.
Knowing my brain however it would probably be the one thing that would remain. I'd be forever breaking out of my nursing home and going on felt pen rampages.
This has been brought on because I've just been to visit my great-aunt. She's always been my role model: this is how I want to be when I'm 95. Suddenly, in what seems to be a couple of months, she's deteriorated. She's hardly there any more. Just a shrunken pained shell.
Depressed. Need chocolate.