If Ukraine can get invaded by countries for a strategic interest, then neutrality isn't a viable option for defense for Ukraine. You could even argue that Finlandization isn't even a viable option any more for Ukraine since given that accepting being in Russia's sphere of influence doesn't provide some diminished form of territorial sovereignty.

And Russia may feel threatened by Western encroachment into areas controlled by the former Soviet Union, but those peoples no longer under Soviet/Russian control appear to taking major steps as sovereign entities to resist Russian reestablishment of its former sphere of influence. If anything, increased Russian belligerence has caused formerly neutral countries to reject neutrality as neutrality no longer protects countries from being invaded due to strategic interest.