Does the World Need More Fancy-Pants French Restaurants?
Although phrased as a question, apparently you have already answered it in the negative. A phrase like "fancy-pants" doesn't leave much doubt about where you stand on the issue—practically implying that such a restaurant could never be worthwhile. (Has anyone ever used the phrase "fancy-pants" about something they liked?)
That's a pity. No one denies that the restaurant industry has been jettisoning formality over the last few decades. But many of the city's luxury restaurants are doing well: just try getting a last-minute prime-time table at Per Se, Daniel, Jean Georges, or Le Bernardin. And it's not just "grand dames" either. The Modern and Gordon Ramsay are fairly new and doing good business, even if the critics largely dissed them.
So I would conclude that there is indeed demand for such places, which is why restauranteurs continue to open them. Ducasse, after all, is a business man (as are most restauranteurs). He opens what he believes will attract customers. Obviously, he is limited by his experience. Ducasse could no more open Babbo than Mario Batali could open Adour.
Does New York "need" Adour? Well, it's not as if people were beating down Ducasse's door. But no one demanded Momofuku Ssam Bar either. It's what Chang wanted to do, and it worked. Last I checked, Chang isn't running Momofuku as a charity, however much heart and soul may have gne into it. It's a business for him, too.
Just because Adour caters to a certain type of luxury, does not mean it lacks heart and soul. The phrasing of your question clearly suggests that this type of restaurant doesn't appeal to you. But why don't you taste the food first, instead of deciding in advance that restaurants that happen to cater to a luxury clientele have no place in New York.

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