One of the most frightening and melancholic conflicts in time travel stories that Stein;s Gate perfects is the idea of retaining memories from other timelines (or alternate worlds), while everyone else around you acts as if those events never happened. Because they didn’t, for them. Moments of desperation in life-threatening situations, gone. Raw, down-to-earth moments between characters who have been antagonistic towards each other, now opening up with eyes longing for answers into the other’s mind, gone. But Okabe remembers. He remembers all of it. And as Mayuri puts it; that is sad.