I miss having my library fully in mp3. I started using Deezer just for convenience, and I kept only the mp3 I have for rare songs and versions. Now every time Deezer kills a song in my playlists, I regret my decision, and I’m too lazy to rebuild my mp3 library. At least Deezer keeps the name of the song greyed out in the playlist, and if it finds another instance of the same song it’s easy to replace it.