Ap1-not true. Like others that have stated above, The best interfaces to a dac are Ethernet and i2s. Most dacs don’t include these interfaces except for the better ones. Toslink would be good except it limits what can be sent thru it. Nobody uses coax anymore. Most people will use usb even though it’s flawed, so the user ends up buying all the gimmicks/tweaks to try to make usb better. You don’t see femto clocks, reclock pieces, or usb splitters to separate the power from the data on Ethernet or i2s.
If you’re into reading reviews, check out some of the latest dac reviews where the reviewer stated Ethernet sounded better than usb. Also some of the more expensive dacs don’t even come with usb, as others have stated and documented in reviews.