The goal for USB receiver is to get data and reformat it for use by DAC circuit. There is nothing fancy there, All magic happens later in clock recovery, digital filtering and actual D/A conversion. There are new new features still coming out. But this all is WITHIN DAC BOX! It is impossible to keep clock stable with low jitter if it is located further than a couple inches from D/A chip. This means that all this magic should happen within few square inches of a single circuit board. This has nothing to do with USB protocol processing.
So all the USB bridges on the market are a waste of money and offer no benefit to the internal USB solution all DACs already have? All of the USB Regen and Remedy products are all a waste of money and offer no benefit? So when I hear any improvement from such devices it is all in my imagination?