Only a few people recommended to use Sphinx at the beginning of the year.
Sphinx has developed rather fast recently. I noted today that Sage has made a change from direct editing with LaTex to Sphinx. This is evident in William Stein’s answer on 2nd April about Sage’s tutorial
The tutorial is not a latex document anymore. It’s an entirely different Sphinx document that can output pdf.
It suggests me that Sphinx may be at a level such that it is suitable for me.
Is Sphinx better than LaTex in writing manuals/books?
We wrote a book with sphinx but we had to tweak the tex file produced with a Python script.
Take a look at this thread, in the book building tool section
Here a some changes we made to the original LaTeX file:
We also made minor changes to book.cls and sphinx.sty
With all these tweaks, we are very happy with the result.