How goes his court ordered Twitter sitter that's supposed to prevent Musk from Tweeting about material effects related to Tesla?

That's what I thought. Musk just ignores the law and gets away with things on a regular basis.

That was a stupid order that would never survive scrutiny under prior-restraint doctrine. Specific performance is something different, though... I can't think of any constitutional problems that might block enforcement of that.

Musk and his lawyers agreed to the provision, and a court approved the deal. That is pretty strong evidence it's not an absurd provision.

He has also violated it multiple times, with no sign of any consequences. That is pretty strong evidence that it was, at best, pointless.

But he has agreed to SEC sanctions and then subsequently ignored them...

One suspects Twitter may have more means and motivation to get what they're owed from Musk than a purposefully-emaciated regulatory body.