Which music streaming platform first introduced a machine learning algorithm that created personalized weekly playlists based on individual listening habits?

The music retail landscape has been transformed by AI and machine learning technologies in recent years. From recommendation engines to dynamic pricing, these technologies have changed how consumers discover and purchase music. This trivia question focuses on a pivotal moment in the application of machine learning to music retail that fundamentally shifted the industry's approach to customer engagement and personalization.

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Spotify with 'Discover Weekly' in 2015
Apple Music with 'For You' playlists in 2014
Pandora with 'Genome Stations' in 2013
YouTube Music with 'Your Mix' in 2016