Today, I am thankful for Red Heart Super Saver.
Blasphemy, I know, but when I need a basic worsted weight yarn to test out a pattern that I'm probably going to rip out an hour later anyway, my first dive is into the bin labeled "acrylic." Last night, for example, I was considering my costume for tonight's roller derby bout, and was leaning toward something steampunk, but I lacked spats suitable for the boots I wanted to wear. I grabbed a ball of Red Heart and some needles, sketched out my plan, did a cheater-swatch, did some math, and cast on. I only got a few inches into it before I realized that a) my swatch/math had been wrong, b) there was no way I could get a pair of spats done by the appointed time, and c) I was, by that point, leaning more toward a renfaire-style costume anyway.
Still, the Red Heart came in very handy, and suffered the frogging with no ill effect. If I'd completed the project, those would have been the hardest-wearing spats a gal could hope for, and I could just toss them in the laundry if they got muddy. So while I won't be casting on for an acrylic sweater any time soon, Red Heart Super Saver does have its uses, and I'm glad it exists.