But, despite an absolutely incredible roller-coaster news cycle, things have been definitely trending down at Twitter ($33/share last month), which was reflected in its share price. The current executive team (and Dorsey) had wasted time focusing on things that didn't matter instead of things that did matter.
Boards have several fiduciary duties to the shareholders. As an all-cash offer, this generates for the shareholders a substantial return with NO RISK, and so the board has a serious legal obligation to carefully review this offer and make a decision.
If the board elects to reject this offer, then their reasons for doing so need to be very clearly elucidated, because, as Twitter is a public company, they would have to see something in their crystal ball that the rest of the market does not.