I feel like superheroes have a plot constancy that forces them to stay superheroes. Their superpowers may lapse, but they generally get them back and feel justified in using them. Their main villains may fall or seemingly reform in one episode or series, but usually return as bad as ever. In Legends, Luke's fight with the Empire is almost over before it has begun. Cleaning up the Remnant and warlords falls to regular X-wing pilots and commandos in the New Republic era. Luke is more of a mediator than a fighter and mostly withdraws from heavy use of the Force by the New Jedi Order era. Even the new enemies of that era don't stay enemies forever. Instead of forcing constancy, Legends allows conflicts in these eras to be "solved" and to permanently change characters.