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

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.