Russ,
Meridian still have dedicated hardware for running Sooloos (plus some dealers are prepared to sell QNAP and charge for this to cover their time and warranty) so are not reliant on third party hardware.
But there are no control solutions that do not use third party devices, like Touch:PC on Windows or iOS Sooloos app. In case of former, Meridian recommend that the Touch PC device be solely used for Sooloos - much like C10/15 - several £000 vs several £0000 - so a win for Sooloos users that want a Cxx type interface even if they have to buy a dedicated PC to do it.
With QNAP, it's a similar scenario to Touch PC and iirc they recommend a dedicated device - similar significant cost saving to the user. But in case of store/core, Meridian have an alternative (MC200 and dealer supported QNAP), unlike control.
If Meridian don't have a product that they can sell, then they won't sell it. But they do have products, but not at the same price point of a DIY QNAP solution. Other alternatives exist as they say.