Michael Fremer uses this to record vinyl and compare cartridges and turntables. Yes, it requires an AD then DA conversion but at 24/192 this is "invisible." I have to digitize my phono stage anyway to send it to my preamp which is entirely digital up to the DACs. Is it worth it? Like always there are various opinions. The computer RIAA is more accurate and has less distortion. I have not tried it yet so I can not say. Fremer continues to use his CH phono stage for most of his listening instead of the computer.
But I love the Channel D phono stages. The L20 is a beast. When I get one I will certainly compare digital to analog RIAA correction