Re: add-list local value

[Richard Stallman]

    And if I have a local value and want to add to the global value with 
    add-to-list?

It isn't hard to do this "by hand", and it is rare, so it isn't worth
defining (and documenting!) a new feature.  It would be a change for
the worse.

Emacs is already very complex.  If we added new primitive features
for things like this, it would become far more complex.