But That is basically what I had been saying. I agree with you
@Zehner that is not a matter of "if" but "when". And
@Morty_ , I didn't say remotely that Russia can sustain it indefinitely. I Think the longer it goes, the worse it will get for Russia exponentially in the middle long term. They basically are screwing themselves for the future, but I don't see Russia pre second term Trump folding before Ukraine does in current conditions let alone now with Trump easing up Russian invasion.
If Ukraine would receive better equipment and quantities (specially artillery) maybe, but Russia is too big and produces too much of what they need. That means they have more manpower and more replenishing capabilities. Not to speak that they are taping into N koreans in the tens of thousands.
Also the most important thing. Putin can't fail so he will run Russia to the ground before pulling back.
Summarizing my point of view, I think russian economy is not in good shape but not as bad as to having to pull out in 2-3 years (and then to reassess if longer), specially in a war economy mentality that lets you stretch you further than European accommodated middle class mentality and also that is existential for Putin (not for Russia) which will push russians to the limit