Re: Idea for determining what users use

[Richard Stallman]

    My point was more about the fact that I think the basis for such a
    feature should be "is it in the `obsolete' directory?" rather than
    some other new annotations.

That approach might work ok, as a way of deciding when to issue the
message.  However, it would require making this a low-level mechanism
rather a function that can be called.  Also, we would not be able to
use it in specific places.