It would be possible to enter into a contract through tweets alone. That didn't remotely happen here, though.
Note that today, Twitter is worth $28B. So the agreed deal essentially gives the shareholders $16B in profit.
So a judge might tell Musk he can’t back out and has to buy Twitter for $44B like he said he would. Or it might let him just give the shareholders $16B and not get the company.
Er, not just the internet now
The current price ($32) reflects be probably won't.
I’m telling you, the guy really signed an ironclad contract forcing him to pay $44B to buy Twitter.
Twitter has done nothing to impede the transaction, so any uncertainty (and thus decline in TWTR share price below $54.20) is due to the actions of the buyer, who is… Elon Musk.
Therefore, Elon is responsible for any decline in the share price since the purchase agreement was signed.
[0] https://twitter.com/matt_levine/status/1545151445057536001