It also makes no sense to nuke the territory you want to take. As a matter of fact, blowing up those DU shells in WESTERN Ukraine is a great idea, because having them used in central / eastern Ukraine would devastate the value of the most fertile farmland in the world, which Putin is conquering.

But I agree, Russia are more likely to initiate large scale nuclear conflict with the West, IMHO.

It's just that this time, Russia used a large number of drones, most of which got shot down by air defenses. You don't do that with nukes! :-P