I'm a huge fan, but there is one big thing Musk might be wrong about: there's a substantial risk that his party-line views on CO2 will eventually look naive instead of visionary. I sincerely believe he's one of the good guys, though, so I hope history won't judge him too harshly for it. (Given HN's mostly party-line views on CO2, I hope I won't be judged too harshly for this comment.)