What does 的 do in "现在的Paul已经63岁了“?
I remember when I first saw things like 小小的我， 年轻的他 it seemed strange. In English you can say:

poor little me

but normally, in English, we need a relative clause to describe Paul 'Paul, who ... '.

Paul put the message in a bottle as a boy. Now he is 63.

现年63岁的保罗对那一天记忆犹新。
Paul, who is now 63, remembers that day well.