More reports-How many corrupted CD-R's with time?

Answered another post where member reported that some of his CD-R's srated to go bad after just 3 to 4 years and thought I could get some more feedback posts.Imagine that favorite LP or tape collection that you expected to get 20 years or more out of start to go bad.Some of the Cd's I bought in 1983 still play though articles said doom and gloom ahead do to oxidation etc.But Red Book CD's use a thin plastic wafer punched with it's pits and a sprayed aluminum that has help up pretty well.But their is obvious difference where with recorded CD's you are essentialy melting a chrystaline metal (re-recordables overwrite simply increase laser temperature to erase previous data).Want to know if has happened with others.Some have said it is dependent on the brand of CD-R's used,the type of dye etc but I am not so sure.The RIAA will juimp with glee if CVD-R's carp out while I and others will weep.Until corprate data needed to stay intact will I think the problem (if it exists extensively) will change things and I am not sure Blue Ray or HD CDR's will address the problem because not enough time has elaspsed before they lose those files.Reports?Thoughts?
Chazzbo