Some, but there are also some very successful startups still run by their founders, like Tesla and (until recently) Amazon. Then there's Apple, which did much b

Some, but there are also some very successful startups still run by their founders, like Tesla and (until recently) Amazon. Then there's Apple, which did much better after bringing the founder back. (I've read that on average, companies run by founders tend to do better over the long term. I'm having trouble pulling up the source though; best I can find right now is the book 100 Baggers, quoting a study saying "there was often a large shareholder or an entrepreneurial founder involved.")