I’m not a specialist, nor lawyer. The discussion I’ve heard so far is that if the judge dismissed the case after the jury is empaneled, but before much (or any) evidence has been presented, then it limits what can be appealed. Appeals can only be done on the case as it was run, not with new evidence, so if she ends it before the prosecution can enter evidence and arguments, then the appeal process might not have much to appeal.
Whether that strategy would actually work to protect the defendant, I don’t know, but it’s currently a scenario being floated by some commentators (who actually are lawyers) watching the case.