I am also anti-markdown / anti-wiki format for long texts. Its formatting techiques are confusing and weak. I spent a long time generating a ~100 page PDF in markdown using ikiwiki. I had to go through lots of jumps to get it formatted nicely (to PDF via markdown to HTML to LaTeX), do indexing and cross-references, literal layouts with formatting, and the wiki source itself became a mess. It was no longer very readable as "plain text" for me. (And reading nroff, latex, or docbook is sometimes easier.)
I have worked with thousands of printed pages based on LaTeX and Docbook without using any knowledgeable word processor. It can also be difficult to read and edit, but for me I much prefer the sanity. I like how I can identify different things using special tags or syntax, do indexing, cross-references, and citations (as an example of some things that are very difficult with markdown and wiki). While I prefer LaTeX, I do like how docbook catches my mistakes better. (Someday, I may try to do an entire book using nroff and some macro.) That said since I haven't been participating in the users guide (and pkgsrc guide lately), my vote would be for the largest contributors to make their decisions. To change the topic a little, it would be awesome if we had some definite goal for the NetBSD Guide and drive it there, like a real book printing. If printed book was a real goal, then maybe the question of this thread would be answered. Thank you so much for your documentation clean ups! echo V nz ybbxvat sbe grpu erivrj bs n csFrafr obbx. | \ tr "VFnoprstuvxyzabcefgij" "ISabcefghiklmnoprstvw"