Elon #Musk not joining #Twitter's board after all. https://nu.federati.net/url/285820 [www msnbc com]

I suspect it is because they reminded him that as a board member, he would have a fiduciary duty to act in the interests of all shareholders, not just himself, and that he could face restrictions on what he could say & write.

Sure, the 14.9% cap probably also bugs him. I just don't think that was enough to dissuade him. While the fiduciary duty is something he may have had trouble with in the past.