I'd like to believe most of us DS users aren't that petty! Personally, I can completely understand that people have their preferred platforms and don't want to completely relearn the wheel just to use both solely for the creation of their products across platforms. It can be frustrating when I see something I really love that's Poser-only, but I don't blame the VENDOR for that for sure. If I like the product enough, I often buy it anyway in the hopes of being able to convert it myself, because, as James R. said, it's all about the art!