Yeah, I was going to point out there's a few "big bombs" out there that aren't useless at all . .
Someone will break the First Use taboo, but I wouldn't put money on it being Russia, at the moment, not for Ukraine, as odd as it sounds to say that.
There are more important concerns keeping Putin from breaking First Use, but one interesting one is a genuine anxiety that the stupid thing just wouldn't work. Just lay an egg of fissionable material in Zelensky's bedroom.