Earlier quoted context omitted.
I think whether they go back will depend on what the country looks like after things stabilize. If Russia comes out of this still on belligerent footing then spending resources to reestablish a presence will be extremely risky. Even if leadership changes and makes conciliatory noises I would expect things to still take some years before the world can trust it's authentic.
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Maybe if Russia stopped invading all its neighbours and all the prior USSR states, these states would stop joining NATO.
The only thing NATO stops is Russian imperialism.