My rides, with human “safety operators” in the front passenger seat, were mostly uneventful, but concerns about crashes and the CEO's maturity persist. AUSTIN—If Tesla Robotaxis were halfway as ubiquitous as Elon Musk’s posts about the self-driving possibilities of his company’s vehicles, this city would be crawling with these cars. The reality of booking Robotaxi rides during SXSW here was mixed: T... [7410 chars]