"The music I’ve salvaged from earlier times is now part of my collection on Spotify, which I’ve been using since it launched in the United States, 10 years ago this month. But as I look back on the churn of the past couple of decades, I feel uneasy about the hundreds of playlists I’ve taken the time to compile on the company’s platform: 10 or 20 years from now, will I be able to access the music I care about today, and all the places, people, and times it evokes?"