I'm thinking that out of every 100 Russian nukes, probably only one has been modernized. It's really expensive to do and from what we've seen of the equipment Russia's been using against the Ukrainians, they haven't modernized much at all. Of course, they could just be using their "C" or "D" equipment in Ukraine because the Ukrainians had only a lot of 3rd rate armaments anyway. That could change on both sides quickly.
But even an un-modernized nuke will do devastating damage.
But even an un-modernized nuke will do devastating damage.