You Have Not Yet Heard Your Favourite Song: How Streaming Changes Music Highlight

circularity is always dangerous, and time spent is a particularly weird metric. Sometimes people spend more time doing activities because those activities are engaging and rewarding. But sometimes they keep doing them out of addiction, or inertia, or fear. Sometimes they persist for tangible but inconsequential rewards, or in pursuit of withheld gratification, or to justify the sunk cost of frustration, or in ignorance of their alternatives.