Short answers, pulled from the story.
The number of interdisciplinary bachelor's degrees awarded annually rose from 7,000 in 1973 to 30,000 by 2005. Data from the National Center of Educational Statistics tracks this growth.
The School of Interdisciplinary Studies at Miami University ceased operations despite healthy enrollment numbers during its active periods. The Center for the Study of Interdisciplinarity at the University of North Texas closed on the 1st of September 2014 following administrative decisions.
Neuroscience evolved from combining biology, psychology, and medicine into an independent field. Environmental science combines geology, chemistry, physics, ecology, and oceanography to address global warming and pollution.
Elias Zerhouni directed the National Institutes of Health to prioritize such interdisciplinary applications. Federal funding agencies now encourage grant proposals framed as collaborative projects.
The Association for Interdisciplinary Studies founded in 1979 represents one US organization tracking these trends. Two international networks emerged later: the International Network of Inter- and Transdisciplinarity in 2010 and the Philosophy of/as Interdisciplinarity Network in 2009.