This knowledge should be more widespread imo, pretty sure there are still people out there assuming CDs are like indestructible. Once I started a job and after a couple of months I discovered there was a closet containing hundreds of CD-Rs all neatly labelled and seemingly containing things like fMRI data used in research. You should have seen the faces of colleagues and the guy responsible for the backups of their data when I told them CD-Rs where not exactly the most durable way of storing important data. (I figured this out because of the very first audio cd copies I had started to develop unexplained errors). They didn't believe me so I randomly picked a couple of discs and like the third one was completely unreadable (I/O errors on ls or so, don't remember).