[Osmium]

Counter-anecdote, I just had the pleasure of meeting a 90-year-old man who was still very mobile, very compus mentis (we had a nice chat that I could have had with someone of any age), and who was surrounded by a loving, social family. Who would complain about that?

[Mediterraneo10]

No one would complain about that, but few people are that fortunate. In my academic field, I know of some elderly scholars who managed to reach their 80s and 90s. Only two are still in a condition to do scholarship. The rest had, at best, to give it up because they could feel their minds deteriorating, or, at worst, they just completely vanished from the scene and it turned out they were suffering from dementia and their families had to take care of them.

I’d love to live to an advanced age if I could still do what I do now, but I agree with the OP that old age in a deteriorated state would suck.