I'm a Musk fan, but literally 90%+ of the things Musk say never actually happen, or happen very late, or have so radically changed in the process as to be something different. You're just quoting the successes, not all the things that he's claimed to be working on in the history of his career.
I suspect one of the reasons journalists are so unfairly critical of him is that the story keeps changing. As an engineer I know this is because he is adapting to circumstance and the reality is that we ought be thankful that he is showing us early glimpses at all. But a journalist looks at that and says "wtf? if I report on this then it's my credibility on the line when next year it's morphed into something else."
These 'journalists' are the ones who make a choice to comment and report on him. If they want to report news that is known and understood by everybody to be a best case, its their own fault.
Musk is interesting in the first place because he is not a typical boring CEO. So they want to use him as clickbait, but then they get shitty if its not 'polished' like what they get sent from the PR departments of other companies.
I suspect one of the reasons journalists are so unfairly critical of him is that the story keeps changing. As an engineer I know this is because he is adapting to circumstance and the reality is that we ought be thankful that he is showing us early glimpses at all. But a journalist looks at that and says "wtf? if I report on this then it's my credibility on the line when next year it's morphed into something else."