CDs are also at risk of disc rot, which might be a non issue for hundreds of years or fail within 20 depending on the CD and storage.
From a Library of congress study:
"The mean lifetime for the disc population as a whole was calculated to be 776 years for the discs used in this study. As demonstrated in the histograms in Figures 18 and 19, that lifetime could be less than 25 years for some discs, up to 500 years for others, and even longer."
From a Library of congress study: "The mean lifetime for the disc population as a whole was calculated to be 776 years for the discs used in this study. As demonstrated in the histograms in Figures 18 and 19, that lifetime could be less than 25 years for some discs, up to 500 years for others, and even longer."
https://cdm.link/2017/02/a-generation-of-cds-is-already-rott...