Your original comment was of your experience, so I shared mine.

Unfortunately, due to manufacturing defects there are discs that will or have oxidized, so the durability of CDs (or other optical media) is not always as reliable as advertised. But as the sibling post to yours points out, CDs provide error correction and along with oversampling provides means of creating effectively bit perfect copies that can be as durable as the current state of the art (redundant, solid state, geographically diverse, etc.)