"such outmoded tasks as buying CDs (No. 10)"
Some of us still do that. Quite a bit of the music I listen to (especially smaller prog bands) are not with record companies and so record and send out to master their own CDs and don't have distribution agreements with the likes of Apple or Google (or Amazon).
I think the only form of streaming that I listen to is Internet Radio (like Morow.com - prog music with no adverts and no inane DJ chat). Well worth supporting!
 Apart from the odd station announcement.