You can't have explosive growth forever. At some point, you look around and realize that you don't need to worry about coming up with big ideas anymore and that

You can't have explosive growth forever. At some point, you look around and realize that you don't need to worry about coming up with big ideas anymore and that what you've developed is mature enough to be a real revenue generator. Hykes clearly isn't the kind of person that likes to sit back so he's off to find a replacement, the guy that will be really good at streamlining what Docker does (and ensuring that the stock does well).