This is a special post for quick takes by davekasten. Only they can create top-level comments. Comments here also appear on the Quick Takes page and All Posts page.
Epistemic status: not a lawyer, but I've worked with a lot of them.
As I understand it, an NDA isn't enforceable against a subpoena (though the former employer can seek a protective order for the testimony). Someone should really encourage law enforcement or Congress to subpoena the OpenAI resigners...