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.
It was a mistake for NATO to do it without Russia. It's not a matter of "influence", but a matter of military risks and perceived threats.
If there was a political will towards pushing Russia to NATO any similar to what has been going on with Georgia or Ukraine, we'd be living in a different world.
But now (really far more than a decade already) Russia is alienated from NATO, perceives it as a threat and a bad actor. And people will be making all kinds of moralistic arguments, but point is that all of this is a consequence of geopolitical natural laws. Fact is, politicians and leaders were clearly aware of those laws and all the cause-effects and general outcomes, but nevertheless had stirred the world towards it.