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?