It was my reply, recommending an USB interface + ADAT.
Paul's reply is not recommending ADAT as an alternative, he mentions,
that ADAT already provided the technology you pointed out.
"Lightpipe can carry eight channels of uncompressed digital audio at 24
bit resolution at 48,000 samples or four channels at 96,000 samples per
second." -
https://en.wikipedia.org/wiki/ADAT_Lightpipe