One of the secrets about Musk is that he is actually a much better speaker when he just goes of on technical stuff like that.
The problem with Musk is that when you ask him an even slightly open question, he always basically goes to the what he considers the fundamental answer. That's why so many of his answer are the same and people who know him well can already tell what most answers to most question will be.
However good interviewer can actually lead him into explaining into going into actual detail and ask smart follow up question and his answers are usually very good. The problem is, far to often he is either doing presentations like this with Q/A or he does podcast aimed at general audiences.
The best interviews with him are with people like Everyday Austronaut where he gets to follow up multible time to actually get out really good information.
I wish he would do more interviews like that, where people can prepare questions and be more direct at what they want to learn. Musk comes of much better in interviews like that and its where you actually learn more of the technical information. We understand that reusable rockets are important, but not why the engine doesn't blow up after 5 runs.