I don't think we'll see DVD-A support disappear, and for one simple reason - it's too easy to include. The chipsets that player manufacturers are using anyway support DVD-Audio, so that all you have to do is enable that feature in the software and you can add another bullet point to your player (not to mention getting a thumbs up from those DVD-A owners) for almost no cost whatsoever. This happened with the OPPO 971H. It actually went to market initially without DVD-A support, but they had a multichannel analog output for Dolby Digital and DTS and realized that the chipset supported DVD-A if they only enabled it in the firmware. SACD is more complex, since it uses DSD instead of PCM, but SACD support is hanging around because that format is still seeing software growth. If we ever can move to HDMI and survive the HDCP horrors that come with it, it'll be even easier for player manufacturers to continue including DVD-A because they can do it while omitting the multichannel analog outputs that SACD and DVD-A both require. It's similar to why Video CD support shows up on most DVD players: there's very little consumer interest in it, but it's so easy to do with the hardware required for a DVD player anyway that it's almost silly not to include it.