very true... and so is the preservation of the data which Adobe didn't do (previously) - so backup of the original raws the way they were created by camera's firmware is the right thing to do - it is a different question from using DNG in your workflow (after you save the originals) or from manufacturers documenting their data in whatever format of raw they choose to use.
Sure they did. Embed the raw in the DNG if you're
so concerned with proprietary data that's basically useless outside any product that doesn't understand that data. Save off the raw as a separate archive. And again, there are provisions in DNG via private tags to put all this basically useless proprietary metadata into the package.
Bottom line: I don't, and many, many users
do not have any need or desire to use the camera manufacturer's raw converter. And as such we have
no use for proprietary data only it could use. I've been an ACR and LR user from prior to their release. I have at least two other raw converters that support DNG just like the Adobe products, just in case Adobe goes belly up and I can't use their raw converter. All I care about is accessing the DNG raw data in the raw processor(s) of my choice and there's nothing standing in the way of doing that simply by converting to DNG.