I believe they will last longer as long as we use high quality fabric. The kind with closer weave. If you can see through your fabric, it is too cheap to use in a quilt. I occasionally sell quilts for other people. The ones that sell the best are the ones made back in the 1920s and 30s. Many of them were made from clothing that had been worn for years. Then the quilts were used and washed. They are still holding up. I do think the quilts that are sewn with the plastic thread to hide the stitching will come apart sooner. I do not think that thread has the stability to last decades.