Recently we had to convert a PDF file to MS Word so that we could benefit from the Track Changes feature in MS Word. The proofreader did not want to use the commenting tools in Adobe/Acrobat because he found them inefficient to propose changes in the text. (Yes, he could make direct changes, but it takes much more time.) We had a LaTeX source file and faced the common challenge of turning this into a Word file. I remembered that Adobe/Acrobat can export PDF to Word files, but as I have experienced many times, the output did not satisfy me at all. I also tried pandoc, but it turned out that we used bits of LaTeX pandoc cannot (yet) handle. When checking the output, I discovered that Word can open PDF files. We quite liked the output and had to tidy up only a few bits and pieces to have an acceptable Word file.
We could have avoided this challenge by using markdown and pandoc to start with… my usual approach these days.
Didier Ruedin 