Bon appétit! or not?

A discussion group recently posted that the phrase “Bon appétit” is no longer in vogue as a toast to begin a meal and, in fact, has not been for years. It seems that this rumor was started by a past edition of the New York Times. “Bon appétit” (literally, good appetite) is defined as: “A toast offered at the beginning of the meal to wish everyone a hearty appetite.” So why would one not want to