Auralic Vega, no USB to spdif converter users?


I read a lot of discussion regarding the Vega being used as a preamp but see nothing about owners using USB to spdif converters, I would appreciate it, if someone could tell me why? It would seem that with all the excitement over these converters, they would used by Vega owners. Is Auralic the first company to perfect the USB interface?
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