Today at Tesla’s first Autonomy Day event, Elon Musk took questions from the press but didn’t have time for questions about lidar. Historically, he’s been vocal about the technology, and this time he put it as clear as he could. “Lidar is a fool’s errand,” Elon Musk said. “Anyone relying on lidar is doomed. Doomed! [They are] expensive sensors that are unnecessary. It’s like having a whole bunch of expensive appendices.