thank you for the link, never came across scribus before!
When I deal with government documents, visas, etc. I frequently need to produce 200-page PDFs that contains bank statements, utility bills, or other documents that arrived as PDF or were scanned into PDF. Some of those were scanned upside down, and then you might need to compress or split the resulting doc because of file size limit. So I need serious PDF editing software to deal with this - converting from PDF and back ruins all the official documents and leads to problems.