They're cheap because nobody wants to buy them lol and the retailers are trying to get rid of the last few they had in stock for years.
I can't be bothered quoting everything you posted lol but I definitely find one hard drive containing all movies and music easier than hundreds of CDs and DVDs.
It is great that you prefer a hard drive.
But that is not the point: millions of us still buy CDs (and DVDs) every year.
I don't understand this comparison with the floppy. Because the floppy was not a industry standard for music. The demise of the CD will be a very protracted and long affair. To repeat -> The point that some of you seem to miss is that millions will still be buying CDs for many years. Certainly for the next 5-6 years which is the relevant time period for somebody buying an iMac today.
If Apple is ahead of the curve, in this instance they have fallen flat on the floor.
Pedro