I think the main point of the article on Eusebius is not that he is directly relevant today, but that he most prominently marks the turn from the secular histor

I think the main point of the article on Eusebius is not that he is directly relevant today, but that he most prominently marks the turn from the secular historiography we associate with Thucydides to historiography as Christian salvation history as the dominant interpretive framework for more than a millennium after him. And I would say that Eusebius is at least relevant for all Christian denominations that have their roots in the Roman Empire after Constantine, West and East, and even outside, as the existence of some Armenian manuscripts of Eusebius' works indicates.