Do you have any first hand (or even secondhand) knowledge of Elon's involvement in engineering at Tesla and SpaceX, or are we speaking strictly in terms of your

Do you have any first hand (or even secondhand) knowledge of Elon's involvement in engineering at Tesla and SpaceX, or are we speaking strictly in terms of your imagination or projection what you think happens? Having watched a few long form interviews with Elon regarding the engineering and construction of Starship, I'm fairly confident he is involved in the engineering. But I haven't talked to actual SpaceX engineers, so discount that as you will. With respect to Twitter, perhaps the engineers drawn to work there are interested in the future vision for the company and the engineering that such a vision will entail. Not to mention, even in its current state, it is a global social media company with 100s of millions of users that I'm certain presents interesting engineering challenges. What cutting edge, successful tech are you working on that makes you so willing to disparage the work of Twitter engineers as "not self respecting"?