I'm using the example of a coma for this question, but there are plenty of similar examples that could follow the same structure.

Let's say someone goes into a coma, and begins recovering. At a certain point, they have regained as much functionality as the doctors think they will get. They are now at a new "status quo" of functionality below where they used to be. The doctors don't expect them to progress any further.

The whole time they were recovering, people were davening for their full recovery. Now that, according to the doctors, progress has ceased, should one continue davening for the person?