I'll be 99 years old

99 LIKES DONT CHANGE IT

102 for me. :p I'll probably die long before then, though.

I'd be 101.
But my grandma remembered the 90's in her 90's in the 90's.
Well, I mean, she sort of remembered them.

I'll be in my hundreds

"90's" "90's" "90's"...
Three 90's...
Insert irrelevant conspiracy triangle joke

If you would be in ur 90's in 2090 that means you were born in the later 1990's which would mean you don't really remember the 1990's and you weren't a 90's kid if you were born in The mid or later 90's

Ill be 94 in 2090