Back when poly knits were popular , cotton quilting fabric was really hard to find. Alot of quilts were made from them. They wear like iron! The color does not fade like cotton... they dry faster. No raveling! Many had no batting since they were pretty heavy. There are some serious items in the plus side.
But..... there is the stretch and ironing is a bit problematic. We kept the designs pretty simple becasue of the streching issues. But a bit of stretch can be a good thing when you are trying to make block or piece line up!
Having done a few back in the day . I think I remember the most noteworthy points.