In my humble opinion, prefering CDs over downloads is some "relict" of being human, i.e., the need or desire to receive some physical object in exchange for money, as it provides the feeling of owning something. It's rather difficult to feel ownership over a bunch of bytes.
As my main objective on music is to be able to listen to it (having random access), I nowadays prefer downloads, if the audio-quality is guaranteed (although, this criteria seems to weaken with getting older
). Of course, downloaded releases will go into my backup as well, as any medium having the "original" music might fail over time. Physical CDs or CD-Rs will be ripped to HDD anyway, as my computer is the most used playback device for my needs.
Another argument might be the (potential) quality difference musical wise, as pressed CDs usually get selected by labels from a bunch of submissions. But usually, this selection today only means their quality with respect to marketability. It's of course nice to have someone pre-select music for oneself, especially because of the shere amount of music being released, but to me it does not matter whether it's a physical or net label, as long as I trust in their music selection. On the other hand, as I am always looking for new music for my podcast, I scan quite a lot of on- and offline labels per week to fetch my own selection, so I may not be the usual listener.