@audphile1 - again, you keep talking about connection to DAC. A separate peripheral interface. I am asking about the streamer itself. Modern DAC USB is no different from USB hard drive, it is 100% reliable with no bits lost anywhere. Receiving data over USB is identical to hard drive, printer or any other peripheral. The data is buffered and clocked later, memory is cheap. This renders all streamers identical. Similarly, there is no difference between routers, Ethernet or USB cables as long as they are properly shielded.
I do not need explanation of electronics or computers. If anyone is still using SPDIF, well, it is their problem.