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Not never but it can go for a long time. This year is 100%, and a good chance for another 2 years beyond. I think at one point the fronts will halt, Moscow has to be glad what they achieved, and sit on their asses, and have a low intensity back and forth for god knows how long.
Problem of Russia, that the current leaders try to make her into a superpower on her own right. And for that she lacks the mass of people and the economy.
She could peacefully expand her influence, but that needs investments in foreign countries. Problem is from most countries their companies are forced out, in Eastern Europe they have to compete with the US and protectionist EU, so this would leave Central Asia, but then it's China, and to some lesser extent India they are facing.