Aren't we talking about what we would want to have? I mean, I even included UAE in my flag theory lol.Austria takes very long to naturalise and doesn’t allow (in most cases) dual citizenship. Even with other EU countries I think. So it’s not really a feasible “flag” unless you want to hold only Austria citizenship.
And as for dual citizenship, none of the countries I listed allow it, however you can get around that. But again, aren't we talking about our "dream setups" or whatever?