Regarding the addition of new streaming services, previously this year D&D gave this quote to The Ear:
"Right now, we're working on implementing both Qobuz and Tidal, as well as UPnP. We expect to release these features later this year." And they will be available as a firmware update.“
Earlier this year, Dutch & Dutch announced a firmware update to make the 8c Roon-ready and upgradable with the Bacch third-party plug-in, the world’s
the-ear.net
It seems however the latest firmware update that was recently announced doesn’t include these services yet:
https://dutchdutch.com/pages/firmware-version-2-6
In the The Ear piece D&D also mentions a smaller version, the 6c, is in development.