Although I only use digital media for painting, etc., I have read in various threads how quite a few who work in traditional media use ArtRage in their planning/testing stage to save on time and expense before settling into a project.
I think Robert´s comment is on the mark. And while the handling of non-digital materials is probably very different, working in AR on composition, sketching, blocking, color, etc. (the major processes you mentioned), should be readily transferrable to any media.
The only problem with humor is that no one takes it seriously.