Balthazar B
500+ Head-Fier
(sorry to rain on your parade)
the PC USB card is more software / driver development than hardware. and potential software maintenance nightmares with each subsequent version of Windows 10 (e.g 1508 vs 1704 vs 1708 vs 1903 vs 1906 vs 2004). doesn't matter how fast / good the USB chip on the card is if the OS and streaming source doesn't have the bandwidth / processor speed / task prioritization to prevent data underruns to the DAC.
CD transport will have guaranteed quality vs any real-time off the internet streaming. (or cache the music files locally onto an SSD, then play back with other PC tasks stopped / minimized)
Maybe Schiit could rig it so that the card is supported only by Linux. It would be like a stealth campaign to rid the world of the affliction of Windows.