"Later figures don't have any where near the extensive wardrobe, so vendors can simply rework earlier content and sell it again (DS based workflow), or the potential customers can convert the clothing they already own (Psr based workflow)."

Actually, DS workflow allows you to fit even more existing clothing to new figures via clones. They don't really need an extensive wardrobe. I can fit V3 content to Genesis 1, 2 or 3 if I want. So it's not only Poser workflow that can use clothing they already own. Just to add, new revisions of clothes are released specifically take advantage of the new shapes for support and has better materials. Also fitting those existing clothing in DS is way easier than having to deal with the fitting room. Thanks.