> Turns out it didn't work well. GM learned the hard way the founder was the best CEO of Cruise. There's a lot they do not understand about how startups and Silicon Valley work.

I'd be hesitant to generalize this lesson. Another case of "adult supervision", in that case against the wishes of the founders, was.... Eric Schmidt at Google. Say what you want about Google, but it's difficult to say that they weren't successful under his tenure (2001-2011)