If 2/3 of the entire active Russian army is now deployed full scale, they better do it fast, topple the current gov and retreat? The longer it goes, the more it exposes both their other flanks (China’s cheeky aggression from the right?) and the Russian population uneasiness about this war (most of them are just tired, peaceful, interconnected with fellow ukrainians and the world, aiming at better living standards?). I am not a military expert at all, but the best path for the locals after such full scale invasions, also from recent history, is activate insurgence and make the occupants bleed day after day, for months or years? I am not sure Putin can do much more than what we are seeing just now, without losing his shirt in a few weeks or months?