The reason they didn't use GIMP is because they couldn't use GIMP. It simply didn't have necessary capability. When I was working in prepress, I would have done

The reason they didn't use GIMP is because they couldn't use GIMP. It simply didn't have necessary capability. When I was working in prepress, I would have done anything to use GIMP. That desperation to escape Photoshop is why Affinity took off. If Inkscape could get a UI for precision positioning, something you could e.g. design an entry form in; and Scribus could polish up, I think a lot of people would move to a FOSS workflow.