To me, Bart's disaperence is really tragic, as he is first mourned and then forgotten thanks to the changing timeline (thanks dc for that one).
But I like to think that even if he was forgotten, even if he had never existed in that timeline, there still existed small pieces of his existance.
Someone you don't remember in a convo, the feeling that someone's missing from an expirience, a damaged photo. Something that proved his existence when no one remembered him.
Those memories still existed, they had just been damaged and burried.













