But if the rovers can still image and scan their surroundings, why shut them off before they have truly konked out? Not only could they monitor changes in the environment, the Pancam can scan various mineral compositions remotely. And the arm instruments could drill different areas in the immediate vicinity.

If the rovers could not have gotten off their platforms when they landed, would JPL-NASA have shut them off just because they couldn't roam? I don't think so.

The rovers should serve as monitoring stations for as long as they can function. We don't have any other operating scientific stations on Mars as far as I know.

The Vikings weren't prematurely shut down even though they couldn't move an inch -though did anyone ever consider lifting them up with their retrorockets and moving them somewhere else? They did this with some of the later Surveyor lunar landers.