Is WW3 all that infeasible? Do Russia (and China), deep down, want WW3 to establish a new world order?
Russia (and China) has been taking the piss for 15 years, with little repercussions. I’m not sure the threats off the back of invading further worries them.
Is the threat of all our nuclear arsenals just that - a threat - and would never actually be used? Therefore meaning WW3 could easily come about in ground and air forces, and medium range ballistics. Rather than nuclear war and a few keys and big red buttons?