Earlier quoted context omitted.
He still has a fiduciary duty since he's not the sole shareholder though.
Who are the other shareholders? I thought the entire point of the purchase is that he bought out all the shareholders.
Also he raised equity investment commitments from a16z , Sequoia , Ellison and few others as well who likely come in as new investors.[1]
So he still has a few shareholders but those who are accredited and have much higher risk appetite and long term view unlike not qtr to qtr of typical public companies so twitter wont be buffeted with market forces like FB is now when trying something radical.
[1] while some of 7B equity investment secured backed out since April , few publicly affirmed their intent to participate recently, no one knows how much was still on table and how much musk took.