A yearslong legal brawl between Elon Musk, the world's richest man, and OpenAI CEO Sam Altman heads to court in Northern California on Monday in a dramatic showdown between two of the most high-profile names in the tech industry. In his $134 billion lawsuit, Musk claimed that OpenAI, Altman and the company's president, Greg Brockman, reneged on a vow they made to keep the artificial intelligence lab a nonprofit in perpetuity. OpenAI has since restructured so that it can operate a for-profit subs...