Digital storage has always been an issue. This isn't something that just popped it's head up. Think about it. What if we had a nuclear war? What if everyone went back to the stone age? Other than books, how would you relearn civilization?
The first problem I seem to remember historians complaining about was the constant change of formats over the years. After a decade or so at the fast pace of the spread of new formats, it was hard to open/store/save the old stuff.
With tape formats, use caused the high frequency to drop out. Worse the over lap of each layer on a tape reel, passed small amounts of magnetism to the adjacent layers and over time this caused the high end stuff to start dropping out. Then over time, the material that is used to store the recording on, starts separating from the plastic backing that provides the strength to the tape. Then you wind up with no data whatever on tape but that takes a while.
With CD storage, it came down to quality assembly of the CD. CD/DVDs are a sandwich. Two layers of plastic, with a foil inside. The foil can't be exposed to the atmospheric air, if it does get exposed, it starts corroding. So the glue that held it all together becomes really important. The poorer quality CDs start to fail at about 10 years. Archive level quality does much better.
Today, were we to have this back to the stone age event, all electronics would be pretty much be gone. That means any and all digital storage would be just so much trash, what remained accessible. Things like stuff stored in the cloud, would just vanish to most people, as if it never was.