I wonder if sales are down because of people like me.
I have dumped and are dumping all my music into my computer. I've just so far have 15 days of music > 24x15 = 360 hrs/5 hrs per day = 72 days without hearing the same song. I put it on continuous shuffle like my own radio station. I'm hardly buying music these days.
It could have something to do with it. I do, however, buy new music. Mostly new SACD releases but some CDs too. Probably one of the reasons I have not downloaded tons having all the music I have (not to mention multiple systems). If I get something new I may play it on a few systems, and, between that, new Blu-Ray releases, and videos on either Netflix or Amazon Prime, I don't have much additional time. I tend to accumulate a bunch of things I want and usually around the beginning of the year order 10 or so new SACDs. By the time I burn them and listen, plus other things I bought, I end up falling behind and then buying more things. I still have one or two things I have not gotten to listen to.