DADs an "interim" format??

I keep seeing statements in here to the effect that the current 24/96, DVD based music format(DAD)is an "interim" format. Correct me if I'm wrong, but as I understand it, DAD formated disks can still be played on DVD-Audio machines. DADs may not be the most efficient way of stuffing a 24/96 signal onto a DVD, but it works and there is nothing in the DVD-A spec that would preclude its use. Am I all wet here or what?