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Those examples (another being the BBC Doomsday Project) merely show that those involved, or interested groups, need to transfer from one medium to another when the original media becomes useless.
We did this for floppies, we did this for cd's and we will do this into 3D holographic chips in the future ;)
The problem isn't so much not being able to look at the old media, it's that we keep the old media instead of copying it over.