We wonder why there's so much ageism. It's because age obsessions stem from this "cool list" narcissistic nonsense. But this is a prejudice all of us will face, because we're all (well, almost all, and with luck) going to be old some day.
The sign of maturity is to see something like this, neither be impressed nor upset/resentful, and just move on. Some magazine made a list somewhere. There were names on it. Don't remember most of 'em. Not news, not interesting, #toobusygettingshitdone, et cetera.
I didn't even read the list and have no idea who's on it, so I have no opinion of the selection, but the fact that people care is appalling.