Looking at a strain of thought that seeks to attribute the current differences in outcomes and 'accomplishments' between Africans and Europeans to the inherent qualities of their populations, thereby discarding the possibility that such outcomes could have been different not so long ago, and seeing this strain of thought dominate HN and HN-adjacent communities (in the form of "we should dig into at'uncomfortable questions' and so forth"), I'd say that yes, Kush has largely been forgotten by the general population, even that part of which who likes to call itself 'educated'.