Steve, you might have misunderstood my point, the Naim App is also a proprietary Control App that only works with Naim, just like Mosaic/dCS;
@nbpf is arguing for a non-proprietary (“open”) UPnP Control-point to work with dCS for gapless, and presumably control all the other often used dCS features as well.
The point I was trying to drive at is that no such thing exist in the real world, from any manufacturer, especially in the high-end arena where vendors are trying to drive value and differentiation, not go down to the “lowest common denominator” (which is what an “open” or “universal” Control-point gets you).