Filler's May 23, 2013 article denouncing the Museum of Modern Art's intention to demolish Tod Williams and Billie Tsien's adjacent American Folk Art Museum building to make way for MoMA's further expansion has been widely credited with prompting the institution to reconsider its plans. As Baird noted, "It is hard to imagine that Filler's voice did not have a significant effect on the situation." In 1978 he married the architectural historian Rosemarie Haag Bletter, with whom he collaborated on the Whitney show. Together they wrote and conducted interviews for three documentary films by Michael Blackwood: "Beyond Utopia: Changing Attitudes in American Architecture" (1983), "Arata Isozaki" (1985), and "James Stirling" (1987).