It might be a case of not needing it but using one and deciding you like it and it helps with your quilting and sewing. Most machines do the binding stitch that sergers do but don't cut off the fabric, but I think a serger makes a lot of other stuff easier. It makes nice finished seams and rolled hems and is great for sewing a flannel quilt so it won't fray away. I think it is up to you if you need one or just want one.