The advantages of I2S are also greatly exaggerated
@carlsbad2 Well, I can tell you when I switched from USB to i2S into my Musician Pegasus R2R DAC through a Denafrips Iris DDC and a $6 HDMI cable from Monoprice the improvement was very significant and many others here have experienced the same (I’d ask @vthokie84 to share his experience with his Pontus II as well as it’s also pertinent here). Obviously this will vary by a given DAC’s implementation of its various inputs, but i2S is clearly superior in my case — not even close. Here’s a review where the reviewer used a DDC to use i2S on a few different DACs (including mine) and was very impressed by the improvement over USB, and his findings are similar to mine.
https://soundnews.net/accessories/level-up-your-dac-musician-phoenix-ddc-review/
Given all this it begs the question, have you ever even actually used an i2S connection to a DAC in your system?