Why does it take Wes Anderson so long to make a movie? By Armond White

Why does it take Wes Anderson so long to make a movie? By Armond White: "Truffaut, Godard, Malle, and Chabrol did in the French New Wave; as Fassbinder, Herzog, and Wenders did in the German New Wave; or as Altman, Bogdanovich, Ashby, Walter Hill, and Woody Allen did during that '70s period known as the American Renaissance."