I think about this a lot as I get older. what I've realized is that being young (like under 30) is a pretty big deviation as far as physiology goes. the rest of life is a long slow decline, so you gotta set yourself up to manage it.
I think about this a lot with regard to software accessibility. We easily fall into this trap of thinking that it's only needed for a small minority of people- but all of us will age and lose the dexterity and senses we rely on to use computers and phones, not to mention that capacity to learn quickly.
Not that a selfish motive should be required, but prioritizing accessibility features today is very likely to serve you tomorrow.
