Sonos to Amp - is simplicity better?

I heard a shootout of some very expensive DACs where, at least for part of the shootout, a Sonos streamer was used as the source feeding the DACs. You could easily hear the differences between the DACS, so the Sonos is certainly good enough that other components matter and can improve the sound.

My dealer loves Sonos as a source component, but, always uses a better DAC feeding into a preamp.