Actually, there is nothing new about this. Extraordinary means, such as a heart-lung machine, may be discontinued if there is really no hope of recovery. But ordinary means such as food, water, antibiotics, or intravenous feeding should not be discontinued as long as the patient is alive.
If the Catholic hospitals in SanFran were doing something different, then they were wrong. And possibly one of their lousy bishops in the past was wrong as well. It was clear enough in the past, except to people who were willing to misread the documents for their own agendas.
Even ordinary means such as food and water are “refused” by the body as part of the dying process. It is sad that the hospitals have to be told to continue feeding.