I think there may be some issues with people's timelines. If I understand correctly, the current era, the Age of Dawn, is in its 56th year.

Which suggests that the Scourge (although still present as a lesser threat) and the fall of Altantis, Iiram and Thule occurred some 56 years ago. Given that the Years of Dusk occurred during the last ten years of the last era (Age of Steel).