Here's my experience: For my wedding gift, over 30 yrs. ago, my mother made a whole cloth quilt using sheets (probably poly/cotton blends) for the top and bottom of the quilt with poly. batting. It was hand quilted with poly-cotton blend quilting thread. The middle of the quilt was quilted on the diagonal forming diamonds. Over the years of use the threads popped, but no cutting of the fabric. I thought maybe because it was quilted on the bias of the fabric, the stretching of the fabric over the years popped the thread. Several years ago I pulled out my quilting hoop and re-quilted it. The way it looked with all the popped threads, I thought the batting was probably pretty much gone, but it quilted up very nicely. In this case the fabric lasted longer than the threads.