I haven't personally used G9 yet, but for now, nothing makes me want to try it. I see renders from other people using it, and I don't see a big enough difference to start over with a different model. It feels like a waste to have assets for G8 or 8.1 and start from scratch with G9. I also notice that several creators are already making content exclusively for G9, abandoning previous versions (which could be sold in different packs). For now, I'll stick with G8.1 and 8, and the future will tell what happens. After all, I don't need a G9 for the final result.