Just in case Meridian give me reason to go Sooloos again?
Apart from MQA decoding (which Roon will also do), Meridian could (should) do MQA-encapsulation of >96k non-MQA material (including DSD converted to 192k or higher), something which Roon may not be able to do.
It would be interesting if Meridian were to leverage its IP and start implementing 818-type DSP in the Core, and to add selection of track/album-specific DSP presets, volume offsets, and the like. That would be real value-added, but I'm not holding my breath.