Many audio equipment manufactures don’t want to run Roon because it takes control away from the apps they have spent so much time and money developing. Also, like Apple, they want to keep you completely within their “echo system”
We had to build the UPnP bridge to play to some popular devices such as NAM and LINN that have so far refused to integrate Roon.
Hopefully these vendors will get Roon Ready in the future. But for new we have a simple solution.