How do I actually publish with Wolfram Notebooks?

NOTA BENE: Any answer that doesn't involve Tex-/InDesign-quality PDF/PostScript output is a wrong answer. And I don't mean "this is technically TeX but is hideous" output, I mean "this will win design awards" output.

It can be done. I got excited before I started using WL when I saw in the frontmatter of Wolfram's "An Elementary Introduction to the Wolfram Language", 2nd edition, that "Typesetting and page production were completed using Wolfram Notebooks". "That's amazing!", I thought. And then one of the very first times I Save-as-PDF of a notebook, the kerning of a Title-styled cell was massively broken. So much for that.

But that's not the only beautiful book that claims as much - so, too, Klopper's "Introduction to Statistics with the Wolfram Language", Bernard's "Introduction to Machine Learning", Dayton's "A Numerical Approach to Real Algebraic Curves with the Wolfram Language", etc. - in short, all of the titles emitted from Wolfram Media.

Now, just recently, Stephen mentioned in his keynote for the Wolfram Technology Conference 2022 that these tools for (self-)publishing are available and that he was ~surprised at the lack up uptake (if my memory serves me).

Really? I have looked and I have not found it.

Perhaps someone from the WRI staff can weigh in. Even better, perhaps someone from the WRI staff can point us (because I am surely not the only human using WL who would love this) at a .ZIP file that has all the tooling necessary for me to transform notebooks into beautiful printed documents without me having to roll my own Notebook-to-(PostScript | PDF | TeX) converter...