My most popular public playlist with the most subscribers is an old Advent/Christmas/Epiphany playlist that is approaching 10k songs, but it's only classical with some traditional folk music to spice things up a bit. Every December for the past too-many-to-remember years, I've added new music to this list. I'd hate to lose it at this point and I wish I could export it. But there is no doubt Spotify has revolutionized the way I listen to and discover music. I'm actually happy to pay for Spotify Premium because it means I don't have to download anything or keep the physical artifacts of music (vinyl) I used to need to make room for and worry about damaging when I moved, as well as all the stereo equipment, replacing tubes and needles, etc.