Why Streaming Changed the Shape of the Charts
Launch library · evergreen read

When charts depended almost entirely on purchases, a listener had to commit real money before a song could register on the chart at all, which naturally filtered out a great deal of casual passing interest. Streaming removed that filter completely, letting mild curiosity count exactly the same as devoted, long term fandom in the raw underlying data.
The result was charts that moved in a genuinely different way: slower to shed old favourites, since a beloved track could keep quietly accumulating plays almost indefinitely, and quicker to reward songs that suited background or repeat listening rather than demanding a single deliberate purchase decision from a fan.
This shift did not make charts any less meaningful, only differently meaningful than before. They now measure sustained attention across an enormous, diverse audience rather than a one time buying decision, which is a genuinely different, and arguably richer, kind of popularity to track over time.