Speaking of the SEC [0]:
> In 2018, he came under fire after tweeting that he was considering taking Tesla private, and the SEC charged him with fraud. Musk agreed to a court-approved deal in order to settle the charges, which required that Tesla lawyers review any social media posts containing information "material" to shareholders. Months later, after he was called out for defying the order, the settlement was amended to include a specific list of topics Musk needs permission to tweet about. The list includes tweets about the company's financial condition, production numbers or new business lines.
> The SEC notified Tesla that two of Musk's tweets from 2019 and 2020 — one about Tesla's solar roof production volumes and one about the company's stock price — hadn't received the required pre-approval, the Journal's Dave Michaels and Rebecca Elliott reported.
I find it hard to overlook that at least one thing that might be motivating him to buy Twitter is to tweet however he wants to tweet, regardless of US law.
[0]: https://www.cnn.com/2021/06/01/tech/elon-musk-tesla-sec-twee...