The devil is in the details (implementation). I2S does not have standard protocol established between manufacturers so handshake is an issue unless you’re using the two components from same manufacturer. Case in point, AQUA HiFi and Rockna, one uses RJ45 and other HDMI for I2S. In this case, I2S far outweighs Coax, AES and USB in terms of SQ.
Which sounds better: I2S or Coax.
Wanted to get folks feedback on is I2S is better than Coax ?