One thing we learned from the Cold War is that Russia doesn’t have the ability to wage war outside its district. The least of our worries should be the Russians. We should be more worried about the countries who buy their stuff.
I don't know about that, but they did a pretty good job of driving to Berlin about 60 years ago. In any case, I wouldn't count out their ability to make adjustments...wouldn't bet my life on it, anyway.
But yes, their spreading military hardware around may be a bigger threat than them using it directly.