A tape-based piece of unique Unix history may have been lying quietly in storage at the University of Utah for 50+ years. The question is whether researchers will be able to take this piece of middle-aged media and rewind it back to the 1970s to get the data off.
See also
https://archive.org/details/utah_unix_v4_raw
TAR file
Time to write on some big ass rocks again!
But really in some ways as tech and storage of info has gotten more dense it really has gotten more fragile and harder to maintain over long periods of time. We may have (m-)disks that can last for decades and more but would the reader last?