This was always the Sooloos design spec, the Control 1, the Sooloos predecessor to the Control 10 before Meridian got their hands on it, I don't think even had a digital output on it.
The original Sooloos concept was correct, I was not happy that M put audio outputs on the Control:10, I see this as a stop gap.
In my opinion the Control:10 in this respect muddies the waters here; M should have put SpeakerLink (and an SPDIF+Comms variant) on a source unit not on a control unit.
Music streaming is and should remain a 3 tier architecture:
Control: Static hardwired touch Screen and / or Large (A4) WiFi touch Screen
Storage: Should be NAS not propriety; Sooloos prices for storage enclosures are ridiculously expensive
Source: Card Based (ID40), external SpeakerLink, external SPDIF+comms, external anlogue variants
Regards,
Carl