CD revenue declined dramatically, and nothing really made up for the decline until the 2010s, when streaming came along. Total revenue from music sales (includi

CD revenue declined dramatically, and nothing really made up for the decline until the 2010s, when streaming came along. Total revenue from music sales (including legal downloads and streaming) bottomed out at about half of what it had been before Napster. The reason for the decline is pretty clear: music was free and convenient to get online, and CDs were expensive.