It was a sweltering October day in 2016 when Elon Musk stepped onto a sun-baked stage in Los Angeles, his voice crackling with the kind of audacious optimism that had already turned electric cars from novelty to necessity. "All Tesla vehicles produced in the future will be capable of complete self-driving," he declared, painting a picture of cars that wouldn't just drive themselves but think like humans: navigating bustling cities, slipping into parking spots without a hitch, and even syncing with your calendar to pick you up from the airport on time. No hands on the wheel, no eyes on the road—just get in, say "home," and let the machine do the rest. It was the birth of Full Self-Driving (FSD), a promise that sounded like science fiction but was rooted in Tesla's audacious bet on vision-based AI. Fast-forward nine years to a crisp fall morning in Austin, Texas. A Tesla Model Y hums along a rain-slicked highway, weaving through merging traffic with the pois...