Tanay Kothari saw Iron Man when he was 10 years old. It was 2008 and he wasn’t entranced with Tony Stark. It was chatty computer JARVIS that captured Kothari’s imagination as the voice assistant managed Stark’s sprawling home, maintained his Iron Man suit, and solved complex engineering problems. Kothari thought this could be possible in our universe, not just Marvel, at the time hacking together an early voice assistant. Years later, talking to Stanford classmate Sahaj Garg, he hadn’t let it go...