I would like to bring to the attention of the readers two articles by Joris van der Hoeven on the theme WYSIWYG vs structured text composition.
One is J. van der Hoeven, “GNU TeXmacs,” in Challenges in Symbolic Computation Software, 2006, no. 06271.
These are the proceedings of the Dagstuhl seminars, an activity of the Leibniz Gemeinschaft; available at http://drops.dagstuhl.de/...
The second (more detailed) is J. van der Hoeven,"GNU TeXmacs, A free, structured, wysiwyg and technical text editor", Cahiers Gutenberg no. 39-40 (2001), p. 39-50, available at
http://cahiers.gutenberg....
I have played a bit with the TeXmacs software, but aside this, I think that there is a strong value in the discussion in the two articles I cited (and I hope the moderators of the comments find mine on topic! I know that the discussion took place a few years ago and that the topic is sensitive for some people, at any rate from my point of view this is relevant)..