You&#x27;re right that there&#x27;s significant legal and regulatory hurdles that have to be cleared, but I think they&#x27;re more of an issue for broad adoption. SF will have a driverless taxi service probably within the next 5 years. Once that&#x27;s in place it&#x27;s only a matter of time&#x2F;strength of the taxi lobby that&#x27;s going to stop it, (and Uber has shown that can be broken even in places like London).<p>If you&#x27;re talking about _everyone_ in major economies having a driverless car, yeah, I think 40 years is realistic given the replacement rate for cars alone, nevermind the legal issues.