No, they won't. These terms just aren't used any more. That's partly because of the euphemism treadmill, and on the colonial history of these terms.
More importantly: the real world does not conform to any such arbitrary differentiation into a single binary variable.
There just isn't any need for such a classification anyway. If you want to index something to a country's wealth, just use any per-capita economic measure and be done with it. GNP is fine, I'm sure it wouldn't make much of a difference if you used iPhones/per million or the Big Mac Index, instead.
More importantly: the real world does not conform to any such arbitrary differentiation into a single binary variable.
There just isn't any need for such a classification anyway. If you want to index something to a country's wealth, just use any per-capita economic measure and be done with it. GNP is fine, I'm sure it wouldn't make much of a difference if you used iPhones/per million or the Big Mac Index, instead.