I am one of the fortunate authors who is able to use TeX for product documentation in a HUGE healthcare company (but I won't say who!). I produce and manage over 500 documents, many of which have 12+ languages within a single PDF. Without this TeX community, the high quality achieved in my documentation would not be possible.

Hopefully I can make a spread the good word about TeX and set a use case example for something other than academics.

I am the author of TeX Tutorials on Youtube (although I have learned much more since I started those videos and simply have not had time to add more).