Europe is going to be the wildcard. If the US sides with Russia and says “take this deal or you get nothing from us”, it will basically be up to Europe to carry Ukraine. If they’re willing to do this, Ukraine can tell the US no and move forward with self preservation. Like you said though, Europe’s resources aren’t what the US has. So time will tell how it pans out. Just keep and eye on Europe to see what the chances will be.