> Some of Asimov's predictions about the future were... off.

I'd appreciate if you'd be more specific than that. I consider Asimov's predictions and insights reasonably good.

I don't have almost any interest in Musk, however, based on what I've read up to now.

Musk is considered a visionary because he does. As opposed to most other visionaries who speculate.

Sure, Musk speculates as well, but when he gives a time frame multiple it by 1.88.