The major film studios already do this: they create a tape print (this process is one of the only reasons Kodak still exists) of every film, including digitally

The major film studios already do this: they create a tape print (this process is one of the only reasons Kodak still exists) of every film, including digitally shot/processed ones, and store them underground. A hard drive might die in 5 to 10 years but film is guaranteed for 100.