Same goes for Russia, and is all seems pretty relevant.

The article seem to indicate that it's much more sustainable for the West than for Russia.

It’s not sustainable for Ukraine.

NATO is ensuring it’s just about sustainable.

Yes, by pushing to reduce the drafting age, which the Ukrainian don't want to, because someone needs to raise families and Ukraine has a way lower population, while Putin brings in north koreans already. And can also escalate by general mobilisation at some point if cornered. So I don't see the outcome as clear.

It's not sustainable for -either- side.

Both sides are aching (very badly) for this thing to be over, or at least taken off the stove.

One can quibble further as to the details -- which are a matter of metrics, wildcards, politics. And (as recent events have shown) there are still many cards to be played.

But that's the fundamental equation we need to keep in mind.

the article is not the reality tho