If he resigns he shouldn't step down immediately. He should say he is staying on as FM until a new SNP leader can be elected, the same as Nicola did. That pretty much nullifies the Tory VONC, although they would probably still want to have it, just to add more humiliation onto to Humza. But the result would be largely irrelevant. Then Labour need to gamble on whether to go ahead with their VONC. Do the Greens and Ash want to bring down the whole SG? Is this really a good time for an election for any of the parties? Not the Tories, that's for sure.