What is an example of a "high-end page-layout program" referenced in that document? I mean, of course I assume they exist for professional type setting, book publishing and such, but I have never seen or heard of the actual software.
LaTeX or Typst are also good examples.
There is only Adobe InDesign. Even though you can make high quality layouts in other programs (Affinity, Scribus) once you get to actually printing in pro printer the whole pipeline is InDesign. It's Adobes secret money printer, software that many don't realize it rivals Photoshop in usage.
We used Adobe InDesign at my last work, which I believe is an industry standard. Affinity Layout if you don’t want to sell your kidney to Adobe. Scribus is an open source project but I’m not sure how the quality is in that.