Of course, producers could switch to making drywhitewine or even red, but by an accident of geography and climate, Sauternes is one of the few areas in which conditions are more or less perfect for the production of that distinctive rich, nutty sweetness.
Curiously though, the whitewine he brought for our meal is very ripe and voluptuous, by no means dry, a 2006 Hirtzberger Riesling Smaragd Singerriedel.