Nothing that the official Spotify client is capable of requires it to be anywhere near as inefficient as it is. This is something I've looked into quite deeply,

Nothing that the official Spotify client is capable of requires it to be anywhere near as inefficient as it is. This is something I've looked into quite deeply, having wanted to write true native alternative clients for all three major platforms. The biggest roadblock at this point is the way Spotify has been handling the deprecation of libspotify. They haven't made a replacement public yet, and the public web endpoints don't support playback like libspotify does.