The function of the quilting or ties is to secure the batting so it doesn't move, shift or get lumpy in one spot. Comforters or quilts from years ago weren't washed like our quilts are today, so they could get away with less quilting or ties. If you quilt, by machine or hand, you are securing that batting much more than a tie, which is just two threads in one spot. So when buying a batting for a tied quilt, look specifically for battings with a scrim.