LOS ANGELES, July 23 : A year ago, Tesla CEO Elon Musk said the company's robotaxi network would expand at a "hyper-exponential rate" and be available to half the population of the U.S. by the end of 2025.On Wednesday's earnings call, Musk and his executive team struck a more guarded tone as they fielded anal

Tesla is accelerating the rollout of its unsupervised robotaxi service in the US, with CEO Elon Musk outlining ambitious expansion plans while stressing safety as the company's…