I think many people are forgetting that the larger army, vastly outnumbering Ukrainian resources in numbers, has not won a victory since the beginning of the invasion. And only presents a problem because the 2 countries cannot reliably use air power to overcome 1st WW trench warfare. Russia has defenses, but no ability to move forward. They are just trying to hold on to what they took in those first few months and are very slowly failing at that. If Ukraine can keep going, supported by the West, Russia will lose. I do not think Russia will use nukes -- any use of a nuke is basically on Russia's own land -- according to them -- and will affect them as much as Ukraine. But the question of ending the war is an interesting one. Do we see Russia continuing the war if they lose most of their ill-gotten territorial gains? What happens to those insecure areas? Are people going to rebuild, i.e. invest scarce resources in unstable areas? Or will they just become dead zones, DMZ borders?