Re: Buffer-local faces

[Richard Stallman]

    A _different_ feature that might work is a way to mark a face attribute as
    `non overridable'.  For instance if a face attribute could be a list like
    (fixed VALUE), where VALUE is a normal value for that attribute, face
    merging would always use the `base' value for that attribute instead of the
    `normally overriding' value.

I really dislike this idea.  Next someone would want a way to mark a
face attribute as super-overriding so as to override the 'non
overridable' marker.  Then someone would want a way to mark a face
attribute as 'really non-overridable'.  I call this the inheritance
arms race.

I see no reason to take even one step down the path.
It isn't really necessary.