But NATO literally (and I also mean geographically) NATO has Ukr on its side. So what more would a country like say Portugal gain from Ukraine's NATO membership, except perhaps having to contribute to their defense even more?
Portugal has barely hit the 2% goal for defense spending that NATO members are supposed to be targeting. So it's not like they'd be spending more to protect Ukraine.
the whole point is by having this big block of countries agreeing to cooperatively fight Russia is if any of them are attacked, is that we don't actually have to fallow through because its to big of a risk for Russia to act up. If they had been part of NATO to begin with none of us would actually had to of sent any aid like we are now. NATO membership is as much about mutual coordination and defense as is is about deterring Russia from starting war in Europe.
Portugal was only an example. They could however find themselves pressured to send soldiers, and not only supplies, should NATO decide to openly declare war on Russia.