The question is how much will it cost to reconstruct some of this information in a laboratory setting?
The Zapruder film of the JFK assassination has been optically scanned. Since the film was shot 8mm film, there is no negative. The film had additional image data around the sprocket holes that no one would ever "see". There is a video release of that footage with the additional data shown (and in several ways).
Also, when it comes to "preserving" data, the historical measure has been for recorded tape. It is the standard for archivists. Digital recordings are not analog. Also they could have dropout within a matter of years (how good are the copies?).
The costly solution (which I have not heard discussed) is optical soundtrack on filmstock. They were actually recording some albums this way in the 1960s.
Too much of the culture has been deemed "disposable", with it history is being discarded.
Albums recorded in something akin to Cinemascope? Never thought of it, though back then it likely would seem a "sound" enough idea. (I'm probably wrong. Cinemascope and Cinerama was even then magnetic recording, can't remember for sure).