Plutarch tells the story of a roman quaestor who, at age 31 came upon a statue of Alexander the Great and wept, for at the same age Alexander had forged an empire while he had accomplished nothing. That quaestor was Julius Caesar.
And I'm not being that sarcastic here. In the sense of what Plutarch wrote, Elon Musk does make me sad. I suppose every one of us can find someone who's miles ahead in achieving the same dreams as one has.