I'm thinking there's a stereotype people can't get past.
My thing is I'm biased against acrylic. I do like Simply Soft, though. So far the one project I made with it is still really soft and minimal pilling (I hate pilling!).
I saw some of the Vanna yarn at a store and it's not as soft as SS. I did like the colors though. I prefer the muted colors. I hope Lion Brand comes out with more colors for Cotton Ease. They can use some of the colors they used for Vanna!