Is DVD-Audio even that popular anymore? What about high quality MP3 audio, I imagine more people would use those.
What is "high quality" mp3 audio?
DVD-A and SACD both lost the bid to become the universal new hires audio standard years ago, but did produce some great recordings which used high resolution sampling, surround and dedicated LFE tracks which make for a more involved playback. DTS also has some excellent sounding audio CD's which also produce high quality surround sound.