Finland got de-Finlandized at last. Which is what the expansion of NATO was always about. NATO isn't a threat to Russia itself - if Russia seriously feared NATO aggression, it wouldn't voluntarily demilitarize its NATO borders during the past 13 months. NATO expansion just neutralizes Russian ability to force its will upon its neighbors through threat of aggression (or in case like Ukraine through the use of aggressi…
I don't buy the idea that it was a mistake for NATO to allow former Soviet bloc countries to join, because it would supposedly encroach on Russia's sphere of influence or increase tensions with Russia. Spheres of influence are gained through economic muscle and cultural power now, not force of arms.
Small countries will and sovereignty also matters.