The polycarbonate substrate could degrade due to temperature, humidity, exposure to sunlight, and other environmental variables. These are concerns for institutions with large CD-based archives (e.g., Library of Congress). [1]
In practice, though, it's far more likely that the the disc will get corrupted from small scratches.
In practice, though, it's far more likely that the the disc will get corrupted from small scratches.
[1] https://www.npr.org/sections/alltechconsidered/2014/08/18/34...