Which of these music product innovations was initially considered a major failure, with its parent company's stock dropping 40% upon release, before eventually revolutionizing the entire music industry?

The music industry has seen remarkable product innovations that have transformed how we consume and experience music. From vinyl records to streaming services, technological advancements have continuously reshaped the landscape. This trivia question focuses on a pivotal product innovation moment that changed the industry's trajectory. Test your knowledge of music business history and see if you can identify which groundbreaking product truly revolutionized music consumption patterns.

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Apple's iPod (2001)
Sony's Walkman (1979)
Spotify's streaming platform (2008)
Beats by Dre headphones (2008)