Yup, even though ADAT was originally a tape based digital audio system, there were flexible communication protocols designed to allow tracks to be bounced, exported, mixed, and processed in a loss-less digit form that made it a powerful editing tool in it's own right. It became a "standard" for a time, and so when computer based recording first appeared, it made sense to allow the software to seamlessly integrate with existing ADAT based studios. It was so handy that it is still in use, even though the ADAT kind of went the way of the dinosaur as a tape based format.
What do you mean "make it cut through the mix"? I've been trying all afternoon to bury it with a stake through it's heart!