I can't speak to Sribus. But also, another aspect of publishing was complete and total control over page layout. Not document layout, page layout.
Notably this including things like adjusting the spacing on a particular line in order to prevent a line break, hyphenation, word wrap, or even creeping on to another page. It's not just about setting fonts and margins, but goes deeper than that.
We use InDesign for building reports and presentations at work. I imagine this could work for that as well.
We use InDesign because it allows for much greater control over layout than something like PowerPoint. We want our reports and presentations (the big ones based on research) to be extremely polished.
This is its killer feature! I've had compliments from multiple pro printers regarding my print PDFs produced with Scribus. Even though most usual PDF pipelines are Adobe based, Scribus PDF files are superior.
This is not true. Dont forget PDF is format developed by Adobe. There is no reason Scribus output would be superior.
Its probably simply that you are more mindful, experienced, systematic user where adobe gets used by complete amateurs more often who have no idea about output.
I asked what the diagrams of a pretty complicated internal system in some documentation was done in once. Lots of them are just Draw.io, but these were hard coded images and there was an error that needed fixing. I thought maybe Visio or Illustrator (Inkscape is what I might use, TikZ would probably be asking a lot). Nope. Powerpoint. I guess I should feel lucky it wasn't Excel....
Basically print, with a mixture of text and images.