The report also says that these hypothetical new methods may not be able to prove safety. It’s not a straightforward problem. How do you prove that you’ve reduced (or at least not increased) a problem that occurrs so infrequently?

Realistically no one will trust “new methods” and establishing their relevance is really difficult. I would imagine that most of these companies are running lots of simulations, because why wouldn’t you? But how many people will see that and trust it more than data gathered on the road?