The founder is someone who can create a product while the CEO can create a company. These are two different skills. That is why not every good founder can become a good CEO, and not every good CEO is a good founder.
Here are a few more interesting observations. The founder should be impatient. He should want to give his product to the consumer as soon as possible. He is also impatient with people, pushing and pulling them, asking to speed up.
The CEO must be super-patient because he needs to carefully build an organization out of a crowd that he has available — piece by piece, brick by brick — structure, processes, routines, as opposed to founders speed.
And if the founder acts the same, he will have low chances of bringing his startup to the stage where he will need a CEO.