LaTeX by itself may be less productive than Word, but it has (at least for me) several advantages that make it for me more productive:

- The standard unix tools (E.g. grep) do work really well with LaTeX, if I have to find something. I would now know how to find a string in like 30-40 .doc(x) files

- Works with git

- Programmatically generating LaTeX is really simple as it is just text (I use this e.g. in my Vala Project. Sure for other language there are libraries to generate .docx files, but LaTeX works for me here better, as I generate dozens of diagrams and so on)

- FLOSS and fully documented

- Documentation is far better (E.g. How do I do X? The results for Word are often spam-like)