Lately I have been working on finally ripping my CD collection to lossless files, namely FLAC. It's about 2000 discs. I started three weeks ago; I'm only up to Miles Davis and already killed one drive.
One striking thing is the failure rate of older CD-Rs. Discs burned in the late '90s and early '00s are failing about 40% of the time. No brand of disc was spared. Bottom line: if you have old CD-Rs laying around, rip them now while you still can!