Then he left Tesla in 2022. So yes, you could argue that it was all Elon's fault and he just followed for 5 years. We won't know with 100% certainty, I'd find it odd to stay 5 years if you think it doesn't work.
What a weird, dumb call that was. "I don't always tackle the toughest engineering problems where lawsuits and lives are at stake, but when I do, I chug a few beers first and tie one hand behind my back."
That's a bummer if true. Is there a reliable source that lays that decision at Karpathy's feet?