To trace the roots of Spotify and the dominance of curated playlists today, we must rewind back to the 1970s and mixtapes. Mixtapes emerged with the advent of cassette tapes and, more importantly, the launch of the Sony Walkman, which made portable music accessible to the masses for the first time. Mixtapes were personal, curated playlists recorded onto cassettes, often shared and copied further. At the same time, radio hosts (e.g. Top 40 shows) were using curated playlists to keep listeners tuned into their frequency.
Into this world came consumer computers, CD/DAT technology, and the digital universe that opened up to the music industry. Sound quality improved, and copying became vastly easier. Around the turn of the millennium, much of this development at the grassroots level was ideologically driven: "information wants to be free!" Sharing music without regard for copyright protections or royalties was seen as cool. If you remember Napster or Pirate Bay, this is the landscape in which they emerged as heroes opposing a greedy music industry.
In the years that followed, legal battles began. Some may remember "DVD-Jon", who stood trial in 2002 for his DeCSS program, which bypassed copyright protections on DVDs. He was not convicted but ceased his work. The legal case against Pirate Bay began in 2006 and ended with a conviction in 2009.
In 2006, Daniel Ek and Martin Lorentzon entered the digital music scene. These two were not from the music industry but came directly from marketing. They registered Spotify as a brand and began working to establish a legal streaming service. Within a year, they secured deals with most major record labels worldwide and could offer a solid catalogue to an ever-growing number of listeners.
Around 2012, Spotify introduced editorial playlists curated by their in-house team with catchy names like "Rock This!", "Most Necessary", and "100% Lounge." Ek and Lorentzon then acquired Tunigo, a market leader in playlist curation. They hired Tuma Basa, who created "The Rap Caviar," making hip-hop suddenly accessible in a music industry that had previously been restrictive towards the genre. By 2016, Spotify employed 50 curators.
Their goal has always been quantity: to hold listeners' hands and guide them through their day with curated playlists for mornings, work/study, commutes, dinner, evening walks, and sleep. Spotify "cured" the fear of silence by creating a 24-hour music universe with no sharp edges. The platform moulded consumers into passive listeners—background music while doing anything else.
Musical quality, however, has never been a criterion at any stage of this development.