I'm not arguing either of these points, I'm just pointing out that all NYT is saying here is that US officials have always believed that Russia wants this war to stay contained to Ukraine. Not that they think Russia didn't want this war or that Russia doesn't have other interests it will pursue external to this war.
All I'm saying is NYT didn't really reveal anything here.
That's true, but that does imply that this war would conclude first. Which is consistent with saying Russia does not want this conflict to expand beyond Ukraine.