Just to clarify, do you mean Roon supports Atmos now? I don’t recall this being released or confirmed as something Roon is working on?
In any case, thanks for giving an example of album in 7.1 that may not sound good if downmixed. I actually haven’t tried downmixing myself to 5.1 and comparing its quality, so I will try it when I get a chance.
Using my Shield TV Pro, Atmos 7.1 tracks sound amazing though, when played by the native Tidal app.
I think the reason that, a major player like DMP-A6 doesn’t support Atmos, or just not yet, is because Roon itself doesn’t support this format yet. Maybe if there is native Atmos support by Roon, then device makers like Zidoo or EverSolo will implement Atmos support. I can imagine something like this may already be in the works, but just not announced yet.
If anyone is interested in Roon providing native Atmos support, please consider giving a vote to this feature request here