Spotify Time Machine used to be a precious tool when it came to find the last song you liked of a playlist that wasn't yours and had been updated. However, the service turned out to be down due to corrupt playlists as well as timezone issues.
These bugs have now been fixed, but the current solutions aren't very robust : the main advantage of these minor fixes is that the interface is now fully functionnal and that backups are regularly done again. As minimalistic interface fix has been done too.
These small changes are mainly there to insure that the whole platform works as it is now. In a brighter future, the changes might become more structural to provide long-term stability.