Mopidy 4.0 is a major release with very few functional changes. The focus has been on modernizing the tech stack to keep Mopidy maintainable and enjoyable to work on going forward.
Read more in our blog post!
Congratulations, and thanks and maximum respect for still maintaining this project after all these years 
Long life to Mopidy! 
Thank you so much for Mopidy! I use Mopidy a lot and therefore Iām very thankful for this cool music server and all the possibilities to connect to (e.g Mopidy-Mobile, Argos, Mopidy-Iris etc)! Keep it going 