> I guess he can afford a $1B penalty,

The $1B is if there's some outside reason why the deal cannot get done, e.g. because of regulatory concerns.

It's not a "pay a $1B break-up fee at your discretion to get out of the deal" clause.

> Accordingly, the parties hereto acknowledge and agree that the parties hereto shall be entitled to an injunction, specific performance and other equitable relief to prevent breaches of this Agreement and to enforce specifically the terms and provisions hereof, in addition to any other remedy to which they are entitled at law or in equity. Each of the parties hereto agrees that it will not oppose the granting of an injunction, specific performance and other equitable relief on the basis that any other party has an adequate remedy at law or that any award of specific performance is not an appropriate remedy for any reason at law or in equity.

...

> (b) Notwithstanding anything herein to the contrary, including the availability of the Parent Termination Fee or other monetary damages, remedy or award, it is hereby acknowledged and agreed that the Company shall be entitled to specific performance or other equitable remedy to enforce Parent and Acquisition Sub’s obligations to cause the Equity Investor to fund the Equity Financing, or to enforce the Equity Investor’s obligation to fund the Equity Financing directly, and to consummate the Closing ....

It's all Greek to me. It seems we're always warned that the Law can't be reduced to a simple formula. Scott Galloway seemed to indicate in his gleeful "Elon pulls out" emergency podcast episode that one valid reason to go to the $1B penalty could have been that Musk couldn't get the right financing together. Would it be so hard for him to get some I-banker on the stand to tell that tale? Why would any of the big banks care about the feelings of Twitter execs?