I don't know. You'd have to ask someone who buys more content than I do. I think the only vendors still using Poser 6 workflows are those who are still making content for V4, since she works in Poser 6 her content needs to as well. But I haven't bought anything for V4 or M4 in a couple years now that I can remember. I'd imagine vendors supporting Dawn, Dusk, Pauline and other figures are making content that works in P9+ and that requires knowing the modern Poser workflow.