the problem with dynamic clothing is that the majority of poser users want instant gratification:  they want to click to load a figure, click to load clothing, click to load a pose, and click to render.

dynamic requires dozens of extra steps. if SM were to simplify the dynamic clothing process to where you load a figure, load a dynamic clothing item, select the clothing, press a 'CLOTH' button and select the target figure from a dropdown, then just start posing with no other steps - then people would embrace dynamic clothing.

until then, its going to remain a niche market.