YouTube Music, Netflix and many other streaming providers have this very useful feature that is called "Smart downloads". YouTube Music also has this feature, and at nights it downloads music based on your listening history, your taste of music etc.
I find this a very practical and useful feature, as there will always be some downloaded (offline) music ready to listen too. I want that Deezer also implements Smart downloads feature for their apps. As a YouTube Music user I really enjoy this feature, and I can assure you that this feature would be a huge improvement for Deezer.

