Not too long ago, a new customer ask me if I would know why the quilting stitches were breaking on a quilt that she had quilted by machine several years ago. I asked her if she knew what thread was used for the quilting; she said that 100% cotton thread was used and that the quilt had not been used a lot but had laid on a bed as a spread, but that people did sit on that bed. I pulled out a cone of 100% cotton thread and asked her take a length of thread, hold it on the ends with each hand and pull. The thread easily snapped into. That, I told her is why I never use 100% cotton thread to sew with. It does not take much pressure to break cotton thread. For general sewing and piecing I use Coats and Clarks Dual Duty and for quilting I use A & E Permacore. Just my own experience. Each one of us have our own favorites; we just find the best for us and/or our machines and enjoy our stitching.