Self-documentation + persistence = art and/or primary source for historians
I once tutored a high school kid who wanted to install a video camera on his hat and film his every waking moment. He wondered at what point would he have to stop filming and start watching.
A display at Incheon’s “moon village” museum showcased the collected diaries of one resident who had unfailingly pasted in his ticket stub from the weekend matinee and wrote notes for each film. Accumulated and presented years later, his diaries were the best kind of time capsule.