Support for those students is crucial. Faculty need to feel that students who struggle with the writing have options. And many teachers may have strong ethical and practical reservations about teaching with writing if no support for students is available. WAC is an outstanding way of meeting those needs for many teachers. Second, there's a natural turnover of faculty who are actively involved over time.
People come and go from institutions.
And once the culture is lost, its very difficult to regain momentum. Joan Hawthorne Univ.