And if the vote of no confidence was premised on preventing a vote on an extension of A50, do you think the other parties/MPs would let May's government collapse knowing that was the cost?
There's way too much uncertainty in all of this and there's so little precedent. It's not even clear parliament needs to vote on an extension. And knowing May's disregard/contempt for parliament, even if it were necessary, it's likely she'd have a go extending it anyway.
None of this is optimism. I'm just less certain about my ability to predict the future.