Great explanation, but I have a tiny, tiny, minor nit-pick

Basically what he said is incoherent to anybody who has worked with larger data.

I’m being pedantic, but I disagree with your wording. As a backend dev, I work with relational databases a ton, and what Musk said wasn’t incomprehensible to me, it just sounded like something a first year engineer fresh out of college would say.

Again, the rest of your explanation is spot on, absolutely no notes, but I do think the distinction between “adult making up incomprehensible bullshit” and “adult cosplaying as a baby engineer who thinks he’s hot shit but doesn’t know anything beyond surface level stuff” is important.