I see that the previous thread is 6 years old, so perhaps time to start a fresh one 
For people who use Roon Endpoints (myself included) it would be a major upgrade to be able to stream from services like Soundcloud and Mixcloud. Would love to see this integrated.
Currently, I am using a workaround (Streaming from Mixcloud or SoundCloud via Roon) through internet radio. This doesn’t work optimally though. If a full integration is not possible, perhaps a feature like SWYH would be a good compromise.
This is my first feature request, so appologies if I am doing it wrong