I remember seeing the release of DB on HN and immediately had a "holy shit" moment, I was literally carrying a portable shuttle computer back and forth to the office before DropBox - congrats to the entire team and thank you for a product I've used daily for 10+ years!
And this is yet another good lesson for would be angel investors AND startup employees - DropBox to me was one of the most obvious product-market-fit startups with a great, competent founding team, A+ quality investors etc and it still took them 13 YEARS to go public and drive liquidity for founders, early employees, etc.