Elon also said the Falcon 9 would work, said it would be re-usable, said the Falcon 9 heavy would work, said the Model S would be good, said the Model 3 would be great, said the Model Y would be the most popular car in the world, etc. etc.

Obviously he's not hitting 100%, but you can't deny his companies are achieving immensely more than anyone ever thought possible.

If I could take Elon's ratio of "I said it would work vs. it's real and it does", I would, and so would any sane person.