There has been executive turnover since co-founder Jack Dorsey's departure in November left Twitter with a new CEO, Parag Agrawal, whose initial actions have involved internal reorganizations. There have not been any major changes to Twitter, which, despite its outsized influence due to high-profile celebrity and politician posters, as well as a devoted base of journalists, has fewer users than social-media rivals like Facebook and TikTok. Musk himself is a huge user, with more than 81 million followers.