None of those founders were actually successful with the other project. Steve Jobs bought then sold Pixar, and later sat on its board, owning a bunch of shares but not actually being involved operationally. Peter Thiel is not successful because of FF or CC, he's successful because of Facebook and Paypal (both at different times). With Elon Musk, you may have a case but I haven't read enough details to know.
The main point the gp is making:
Peter Thiel is known for: Paypal and after that Facebook
Elon Musk is known for: Paypal and after that Tesla
Clarification: He was wealthy but illiquid before the Tesla IPO. He did not realize how ungodly expensive his divorce would be - he had to pay for both sides since he was wealthier and his ex was happy to use his money to pay for legal time to maximize her take.
does Steve Jobs spends as much time/effort in Apple as in Pixar? Does Steve tell Pixar animators a thousand "no" till the animation is done "right"? I would guess no.
Steve worked on-site at Pixar one day a week (Friday) until the Disney acquisition. Day-to-day management went through the executive team, primarily Ed Catmull for technical and operations, and John Lasseter for creative direction.
Still, Executive Chairman and CEO are two rather "big" titles. If he can juggle both and be successful I will be impressed. We will never really know how much effort he puts into each role.
like Elon Musk with Tesla and SpaceX?
like Peter Thiel with Founders Fund and Clarium Capital?