Elon Musk made a huge robotaxi promise. Now investors are asking what happened

Tesla's once-bullish tone on robotaxis shifts

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…