To me, most of those questions do not apply.
1. The convenience of use and portability, all you want is on one simple disc and you just slot it in and the entire thing fits in the palm of your hand.
2. As at then, there was no mp3 and carrying a cd player and cds were cumbersome, the cases easily damaged and the discs scratched. 3. The quality of the music, both from the big decks at home and the micros, unbelievable, and there was no other way except cds at the time. The standards remain the same to date.
4.The durability, and the confidence it gives you that the music is still there, can you imagine all this while and still going on without any hitch.
5. The ease with which it was transferred and speed via software,
Many more reasons,