Closing arguments for Elon Musk’s lawsuit against OpenAI wrapped up on Thursday. | Benjamin Fanjoy/Getty Images Friendship breakups are never easy, but few are as messy and expensive as the collapse of Elon Musk and Sam Altman’s once thriving tech bromance. On Thursday, closing arguments wrapped up in Musk’s lawsuit against OpenAI, leaving a jury to deliberate next week whether Altman and other executives “stole a charity” (as one of Musk’s lawyers put it) by turning much of what was once a no