Everyone on the internet knows how to run Twitter better than the richest man on earth who revolutionized both the electric car and private space industries. I wish I could invest in Twitter now but I’ll wait for the cryptocurrency launch.
Your sarcastic implication being that being good at managing car and space companies make him good at managing a social media company? Not only that, good enough to be better at it than his predecessor? Not only that, he's better at it within days of arriving?
Optimizing a factory is indeed quite a lot like optimizing cloud infrastructure. Different domains but there is a lot of overlapping skill set and having developed that from zero scaling Tesla is exactly the experience that would make an executive good at reducing costs and bringing Twitter to profitability.
Building cars is the place where modern efficiency practices were developed. (Much of it started in post war Japan with American auto industry help, the fusion of cultures developed something quite useful)
To be fair, Jack Dorsey rolled over his ownership into the new structure. There are few people who know twitter, it’s problems, and potential than him.