> As a ~20 year old this feels so weird to read. I'm still considered young in ~10 years?

An anecdote for you...

In Summer 1997 i was 24 at a family reunion, listening to my grandmother and several other seniors talk about some recent interaction my grandmother had had with a delivery person. One of her friends asked her, "how old was he?"

i'll never forget either her response or my jaw-dropping which followed:

"Oh, he was a _young_ man. About 50, I guess."

(Yes, she actually stressed the word _young_.)