It's one of the biggest engineering problems in the last 10 years due to sensory input issues, dealing with the unexpected behavior of outside influences and you have to have the mechanical and software components that the first two components give the commands to, and can then faithfully execute them https://semiengineering.com/challenges-to-building-autonomou... and https://semiengineering.com/more-data-more-problems-in-autom...