Oh, that's OK... DVD-Audio is easy to rip to multi-channel FLAC (see next comment); Google: DVD Audio Extractor.
Nothing, and I've ripped all of my personal DVD-A, BD and DVD Video discs to multi-channel FLAC as soon as they arrive from Amazon, et al. I connect my MacBook via HDMI to my AVR, fire-up Audirvana+ and play away. But, sometimes the discs come with pretty cool art work that plays on the screen during playback and it's nice to just to pop in a disc, versus hauling my MacBook out.
To be honest, I've been spinning more discs lately because of that last reason.
This is why the whole 16 vs. 24 bit thing is annoying for me, because it's a distraction from things that add real value to the playback experience, like well-mastered multi-channel audio. When its done well, it's incredible.