I can understand searching for music and it not being there. However stuff that is already in playlists? Isn't there a big focus for music retention? I took a huge hit on my EDM music over the past week.... It completely sucked.... Kap-Slap, 3LAU, Tiesto.... Just to name a few.... Any answers on why these are just suddenly going away?
The music in question might have been removed from Spotify due to requests from music labels.
The only thing Spotify does is upload music via the request of music labels.
Sometimes labels change their mind or the music rights change and as a result they send Spotify a request to remove certain songs or artists. Spotify has to take down music if labels request it.
You can find out why some songs/artists are no longer on Spotify over here.