Digital vs. analogue?
I can see the problems that arise from the volatile nature of digital records. It's much easier to lose or destroy than paper. But on the other hand it's much easier to duplicate, so the net attrition may be the same or less.
What surprises me is the suggestion that the ability to read old digital data may be lost in the future. Is there any evidence that this happens? If I dig out a 40-year-old CP/M floppy, will it be impossible to read (in the unlikely event that there's anything on it worth reading)? The effort and ingenuity that go into reading historical material like the Dead Sea scrolls and carbonised documents from Herculaneum suggest not.
It's a bit like the distinction between digital and analogue computers. Reading ancient digital information is presumably a matter of emulating the obsolete technology; a tricky but quantifiable problem. Ancient analogue information presents much greater challenges.