These advantages are, BTW, also the reason why tanks prefer open terrain. Not because they need to cross it to reach cities.
But I concur with Arrigo — studying ammo expenditure data from the October War would be very interesting! The Arab-Israeli wars are generally speaking likely the most relevant to study in this context.
I've said it before, but it seems it bears repeating: the technology and organisation of armoured warfare and its supporting functions have evolved very drastically in the hundred years tanks have been around.
We need therefore to be very careful indeed in applying observations from too far back during that short history mutatis mutandis to the late Cold War!
Likewise, we need to be very careful in applying any events from IRL history that take place from 1989 onwards to the Twilight setting, as many decisions from that year on clearly were driven by a realisation that the Cold War was ending.
It bears noting that the actual goals of a war can vary ... quite a lot. In the end, the only general statement that can hold true is that a war's ultimate goal is to secure whatever objectives that were the point of starting it in the first place. For instance, if Russia's goal in invading Sweden is to secure the landmasses guarding Öresund and Kattegat, whether or not Sweden's leadership surrenders or concedes will be completely irrelevant to them, as long as they achieve their territorial goals.
I can recommend reading von Clausewitz, if you haven't already.
critical terrain (which, again, is cities)
You reiterate that as a truism ... but could you motivate it? I honestly don't see why cities would be anything but an obstacle.
I countered a bunch of aramis's motivations to why cities are important on the previous page. Could you please present your arguments, to illuminate where you consider my reasoning fallacious?