Correct. I have seen Affinity Designer put forward as a page layout competitor also, but this is naive. Just regarding color alone, it would need to be able to

Correct. I have seen Affinity Designer put forward as a page layout competitor also, but this is naive. Just regarding color alone, it would need to be able to support multiple colorspaces in a single document and retain them in the resulting PDF. In the world of modern RIPs and digital printing, the RIP often handles colorspace conversion. Thus it is common to leave your source material in its original colorspace and tag the individual objects in a PDF with profiles. And don't even get me started on how bad type is in the open source world (No, TeX is not an option in print).