The robotaxi market's biggest hurdle isn't a specific tech, but a scientific framework to prove its safety, 2007 Turing Award Laureate Joseph Sifakis, who was named chief scientific advisor of Caocao Mobility in June, said in a recent interview with Yicai. Dismissing vision-only approaches in favor of multi-sensor fusion, he noted that rigorous safety validation remains essential before fleets can scale to full operational coverage.