When a user adds a crate, genre, or Spotify playlist, it is always added to the bottom of the list for its particular section. For users with a small amount of items in these sections it might be fine, but users with many crates or playlists may want to order them based on current priority, to create groupings, or simply for ease of access.

This feature would allow users to organize their items in a way that helps them most, overall creating a more personalized experience.