[kingosticks]

Do they publish their roadmap?

I'd imagine they consider what they have is good enough considering the backwards compatability issue it'd likely introduce.

[ValentineC]

They don't publish their roadmap, but there have been threads on their community forums suggesting this, and an official "Not Right Now" response:

https://community.spotify.com/t5/Live-Ideas/Music-Use-Opus-C...

[nsteel]

I've yet to see them implement anything suggested on their forum (or github).