Which music retail innovation first surpassed physical CD sales in revenue generation in the United States, marking a historic shift in the industry?

The music industry has undergone dramatic transformations in how consumers purchase and access music. From vinyl records to digital streaming, the retail landscape has continuously evolved. This trivia question explores a pivotal moment in music retail history that changed how we consume music forever. Test your knowledge about the business side of the music industry and the innovative products that shaped our listening habits.

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Apple's iTunes Store digital downloads (2012)
Spotify's premium subscription service (2015)
Amazon's MP3 Store (2011)
Napster's relaunch as a legal subscription service (2009)