well - you, for the record, clearly have vested interest in Adobe's products... you participate in PixelGenius, which is a commercial for profit company, selling products for Adobe products...
Doing my best imitation of Samuel Jackson as Jules: Check out the big brain on Brad! <g>
You connect those dots yourself?
Of course I have a vested interest in Adobe products. Not that their design or the use of DNG has anything to do with a Pixel Genius product. Not a day goes by that I don’t use either Lightroom, Photoshop, InDesign, Acrobat. And yes, I make a living teaching people to use many of those tools. Vested interest? You bet.
The difference between you and I is that this is all very transparent and obvious. And none of has any bearing on photographers needs, my needs, to have an open raw format be it DNG or DOG. Unlike you, I don’t use aliases here, there is a link in every post I make that takes you to a web site that spells out my involvements, including PG and Adobe.
Getting back to the topic (although you are doing a good job of digressing again)...
those who use DNG now can (and do) still put undocumented data there (think Pentax/Ricoh for example) and that kills the whole idea (you know where the data is, but you do not know what it means... great, isn't it ?)
Kills it, nope. Not even close (talk about the mind set of throwing the baby out with the bath water). The data is sufficient that should say Canon come out with the 5DMIV with a DNG switch, I can handle that data in my beloved Adobe raw converter the day it ships. If I want whatever you consider useful undocumented data, I move the switch to proprietary raw and use the Canon converter. Or I move the switch to JPEG.