My point is that Putin wants to live; he's unlikely to survive Moscow getting glassed, regardless of who does the glassing. So he's unlikely to convert all of

My point is that Putin wants to live; he's unlikely to survive Moscow getting glassed, regardless of who does the glassing. So he's unlikely to convert all of Ukraine to a moonscape. And anything _less_ than glassing Ukraine is unlikely to change Ukraine's behavior or materially affect the special military operation's progress. Hypothetically, if Ukraine has a breakthrough after a massive collapse of the russian army, nukes will prevent Ukraine from going all the way to Lubyanka Square. But there's no way to use nukes to help the russian invasion any more than a shotgun will help with colon cancer.