One of the immutable, unwritten laws of wine writing has been that you must describe Chenin Blanc with one or more of the following terms: underappreciated, underrated or underdog. But the reality is that some of the most exciting white wines in the world are Chenin Blancs from Anjou and Touraine, in famed appellations such as Montlouis, Vouvray and Savennières, as well as from a wave of producers in Anjou who’ve shunned the traditional appellations and chosen to bottle their wines as Vin de France.