I bought a batch of CD-Rs that turned out to be garbage. About half of them have a life of about four replays after being recorded on. The discs were burned copies of LPs.

Fortunately, I took the precaution of keeping copies of the digitised LPs on a hard-drive, but Nothing Is Forever! And particularly CD-Rs, it seems. Also, some of the CD-Rs will play perfectly on one player, but not on another!

I'm not alone. I bought a semi-pro produced CD, and the whole silver surface lifted off, leaving a clear plastic disc.
It showed bubbling, first.