It's long (2 hrs) but I found in it interesting.
https://www.youtube.com/watch?v=ycPr5-27vSI
Some high points (from my prospective) that I found is that Musk is kinda afraid of IA developing too fast and his opinion is AI, without control, is going to open up a Pandora's box.
Another thing is just watching his eyes, facial expressions, cocking of his head, body language. I'm not a psychologist but most questions and topics it seems that he is computing things in his head almost Rainman-ish. The guy has a ton of information swimming around up there and is not really sure on how to digest it and vocalize it. My un-psychoanalysis is he truly wants the best for human kind.
Some may say he's an A-hole, ego driven, narcissistic, ect. Most brilliant people are. In this interview he seems as an average dude with a million things he wants to try and has the billions of money to do so. He doesn't seem to care about money (he's made his braziion dollars... been there done that thing) and wants to invest and spend what he's gained to make things, push the envelope and push technology forward.
Case in point: he didn't like being stuck in traffic in LA. Hey, lets try to make some tunnels. We can dig a ditch in a parking (he made it happen in like 48 hrs). Now, lets make a tunnel. Ya know... just for fun and see if we can do it. I have a brazillion dollars so let's make it happen. BOOM, a mile long tunnel from one parking lot to another.
The Big Dig in MA cost the tax payers God knows how much money and took nearly lifetime to achieve what Musk could have probably have done in a few years and for a fraction of the money (guestimating).
The Big Dig was the most expensive highway project in the United States, and was plagued by cost overruns, delays, leaks, design flaws, charges of poor execution and use of substandard materials, criminal arrests,and the death of one motorist. The project was originally scheduled to be completed in 1998 at an estimated cost of $2.8 billion (in 1982 dollars, US$7.4 billion adjusted for inflation as of 2020). However, the project was completed in December 2007 at a cost of over $8.08 billion (in 1982 dollars, $21.5 billion adjusted for inflation, meaning a cost overrun of about 190%) as of 2020. The Boston Globe estimated that the project will ultimately cost $22 billion, including interest, and that it would not be paid off until 2038.