I switched my design workflow to FLOSS tools exclusively. Krita is a perfectly competent photoshop replacement, Inkscape has been developed at a breakneck pace in the past year, the workflow is different, but it’s every bit as good as illustrator, and Scribus is great once you get used to the workflow. If anything, Scribus’ workflow helps you plan and structure your projects better. IMHO FLOSS tools are absolutely ready for professional work, but you cannot expect the workflow to match existing proprietary tools.