There is a reason LaTeX is barely used out of academia.
That's simply untrue. Look at any serious programming books. And LaTeX is used as the back-end for quite a number of text-processing tools.
Professional publishing has long ago switched to DTP tooling, able to handle layouts and colouring in modern presses.
That's simply untrue. Look at any serious programming books. And LaTeX is used as the back-end for quite a number of text-processing tools.