Hello all, Pierre-Jean, you ask for experiences of users. My own is that I used troff for all academic documentation, once Unix was obtained, but once groff appeared (in the early 1990s) writing troff macros became easier (well, less difficult).
I did a great number of newsletters and handbooks, trying to learn the rules of good typography as I went along, and learning by example. I developed a number of different packages, but it became clear that they all had common features, so I decided to start from scratch and write a LaTeX-inspired comprehensive package, which I now use for everything except man pages. I have retrospectively converted some technical LaTeX documents to use my package, and the results were very successful. My package (-markup) is as ambitious as -mom, but very different in it's user interface and coding style, probably as I have a maths and programming background, whereas Peter's is more literary. I've occasionally attempted to typeset poetry, which I found quite difficult. One of my regrets is that there is no troff interface for Lilypond... Denis -- () ascii ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments