Rod, if you're in the business of SELLING wine, as almost all contributors to this stimulating discussion are, the use-function of romance and mystery is minuscule. Of course we're cynical! Since very few wines worldwide conform to an absolutely non-manipulated (and therefore substandard) "natural" expression, we now need to adapt in ways Greg (brilliant!) and others here have detailed so clearly. I think he gets to the core problem:overripeness. That is what changes water use, yeast use, acidification, and some enzymes probably too. True "wines of place" are always barely ripe, and exist in the narrow margins where weather and water necessitate minimal yields and extreme selection. Think Urziger Wurzgarten, Cote Rotie, and Grand Cru Burgundy. They are accidents of nature, and notable for their understatement. The romance and mystery is that in some lucky vintages they are mindblowing. And yes, they all have manipulations of differing sorts. Sulfur to stop a fermentation, anyone? How about a bag or three of sugar in that tank? Got viognier to coferment with your chilly hilly syrah?
By comparison, West Coast US and South Australia and Mendoza are all deficient in the natural limitations of the production cycle. What was that you were about to say about Sonoma Coast?