Much would, IMO, depend on where RU chooses to do the Stupid Thing, which I could guess would be well away from their ill-equipped and NBC-ready troops. And, of course, the readiness state of assorted Western assets [land/sea/air] to generate a swift response. That we will not know, or should not know. until they are used.
We are all standing on the cliff edge, and subject to the fantasies of Putin and his lap-dogs.