It does happen that tech CEOs found companies that compete partially or completely with their prior creations. Usually at that point the founder CEO only owns a

It does happen that tech CEOs found companies that compete partially or completely with their prior creations. Usually at that point the founder CEO only owns a small portion of the company, and the new company might give them the opportunity to capture a larger fraction of the market. They already know it well, having participated in it a few years ago, and there might be structures in the prior company that might prevent them from pulling off their success in that one.