Status of CSS3 Generated Content Module

The CSS3 generated content module [1] hasn't been updated in what appears
to be nearly 10 years. It contains a much more sophisticated version of
generated content that as far as I can tell no one ever implemented [2].

Should anyone be trying to implement this stuff? Should it be considered
abandoned? If not can get a get a big red banner saying that the spec is
dead?

[1] http://www.w3.org/TR/css3-content/
[2] Opera does seem to allow content to replace the inside of a random
element, but not nesting and such.

- E