Tesla CEO Elon Musk first floated the idea of launching a robotaxi network using autonomous Teslas in 2019, saying he expected to begin deployment the following year. But Musk isn’t exactly known for sticking to his timelines.

The product launch in Burbank didn’t address how Tesla will make the leap from selling advanced driver-assistance features to fully autonomous vehicles.

Elon Musk unveiled Tesla Inc.’s highly anticipated self-driving taxi at a flashy event that was light on specifics, sending its stock sliding as investors questioned how the carmaker will achieve its ambitious goals.