I'll always remember this really sad story I read somewhere. An old couple had rented early video-recording equipment for a trip to the grand canyon. They took videos of the canyon, and some of the videos included brief accidental glimpses of their young kids in the periphery. Decades later, those glimpses are priceless and precious to the old couple, whereas the videos of the canyon are worthless. "Why did we aim the camera at those stupid cliffs?! Our kids were right there! If only this shot was one more inch to the left..."