Stability AI, a startup that rode the boom in generative artificial intelligence to a $1 billion valuation before experiencing financial trouble and employee defections, has a new CEO. Prem Akkaraju, former CEO of visual effects company Weta Digital, will step into the role, according to a person involved in the decision.The 51-year-old Akkaraju is part of a group of investors including former Facebook President Sean Parker that has stepped in to save Stability with a cash infusion that could re...