This is anecdotal, but in my retrocomputing adventures I use a lot of factory pressed CD-ROMs from ~1993-2000 and I have yet to see one fail to read purely due

This is anecdotal, but in my retrocomputing adventures I use a lot of factory pressed CD-ROMs from ~1993-2000 and I have yet to see one fail to read purely due to age. Burned CD's are a lot worse. How much worse depends a lot on quality and type of disc, in my experience. If you cheaped out on CD-R's by buying the no-name 50 pack spindles back in the early 00's, those will likely all be unreadable now. The fancy gold Kodaks might have survived, though. I also collect music CD's and it's getting to be a problem that there's a lot of obscure music (demos, live recordings, etc) that only exists on CD-R, and in very limited quantities. I do have rare demos by local bands etc. that have started skipping just because of the CD-R media aging.