I did a charm quilt using double knits back in the early 70's. My sister, who I made it for is still using it. Back then I did not even think that making a "blanket" out of 6" squares was making a quilt. Until you mentioned this I had not even considered myself a quilter until the 80's. I made a couple of baby blankets out of double knits too back in the 70's too. Like you said the double knits are indestructible.