The point of an acquisition agreement isn’t to give the buyer optionality to acquire another company, it’s to ensure the buyer honors its commitment to acquire another company during the period between the time the buyer agrees to acquire it, and the time is it able to close on taking ownership.
Maybe EM developed buyer’s remorse because of the decline in equity markets, or a belated realization that the CCP will have significant leverage on how he runs twitter, or just woke up the day after signing with that feeling you get when you realize you’ve knocked up Grimes not once but twice.
Just because EM wants an escape hatch, doesn’t make it so. There’s a pretty tight contract that says he needs to buy twitter, at the agreed price, using the committed financing he arranged. EM can try to retrade the price all day long, but then there’s still that pesky matter of a binding contract… to buy Twitter… at the price he agreed with the board… that doesn’t have a diligence out or an “ehhh changed my mind” termination provision.
For a variety of reasons, the board doesn’t have a tremendous number of appealing options (like none) but they have a strong contract that explicitly contains EM’s affirmative obligation to, y’know, buy Twitter. That fact has very little to do with his feeling.