Other large content providers report nontrivial amounts of IPv6: Google frequently serves more than 20% of content over IPv6, as does Facebook, as do general CDNs such as Akamai or Edgecast. Some networks, such as my ISP, are IPv6-native with tunnelled IPv4 to the Internet. Companies, including mine, are investigating IPv6-only office and DC networks to simplify security.
Most of the work is in the desktop client for you. Is this on your roadmap?
Your idea has been submitted a while ago but unfortunately hasn't gathered enough kudos (100 per year). In order to keep an overview of the active & recent ideas in this forum, we will close this idea for now. However this does not mean that your idea has been declined by Spotify.
If you still feel strongly about your request, we encourage you to post your idea in a little different form again! Maybe now is the right time to receive the support of our community for your suggestion! ;)
P.S: More information about how the ideas exchange works can be found here.