DC Comics seemed to have a pretty cohesive universe going from the Silver Age to before Flashpoint. Obviously there were retcons, reboots, and abandoned plotlines, but you felt that there was a ongoing narrative from Pre Crisis to Post Crisis that was shattered during the New Fifty Two. Continuity wise Rebirth and onward brought back elements of Pre-Flashpoint, but it seems to me that the damage was done and the characters today aren't the same ones from 1960 to 2011.