Slovakia will ending their support for Ukraine isn't a problem as to what will happen when the US and EU stops supporting Slovakia.
The amount of money the US and EU has poured into Slovakia the last ten twenty years is far from insignificant.
If Slovakia decides to stop believing in Europe then Europe will stop believing in Slovakia.
W2k was awesome. Great stability. However, the legacy from Windows NT meant that applications had no direct access to hardware which games of that time required.
That was a showstopper for most users outside the enterprise world.