I do agree that any putative threat of serious war with Western Europe is in effect over for the near to medium future, however I wonder if the loss of senior staff is actually as catastrophic as is sometimes painted. Famously analysis of the Russian Army's weakness has highlighted its corruption, second-string status in the institutional hierarchy and tendency to be more moth than trousers in terms of battle readiness. But neither the Kremlin as a whole nor Putin as an individual are totally unable to draw their own conclusions from that, and start replacing makeweight bureaucrats with more effective soldiers in future. I'd not be nearly as sanguine about the future of a re-arming Russia fresh from a major victory, if I was in a nearby non-Nato, mineral-rich country, for example.