<p>"IMHO they are a recipe for disaster."<br>
Oops! So sorry for the confusion! I omitted two little words from this: '...for me'. Knowing the way I work, at some point I'll almost certainly delete the XMPs or overlook them when moving my NEFs somewhere else. I already have enough files floating round the place without doubling the number - a single original file per image is enough for me!<br>
One thing that I am curious about is Eric~'s assertion that DNG is an 'obscure format that the industry is already forgetting about'. Leaving aside the fact that some manufacturers -- Leica, for example -- are using the format in camera, there is quite a bit on the web about the advantages that DNG offers. For example, the Library of Congress seems to be indirectly funding the promotion of DNG (click <a href="http://www.dpbestflow.org/DNG">here</a> for details) as well as other proponents of the format such as <a href="https://luminous-landscape.com/rantatorial/a-plea-for-dng-again">Michael Reichmann</a>. So I'd be interested in hearing the evidence for the format being dropped.</p>