I use my vintage machines for both piecing and quilting. And for my that typically mean Free Motion Quilting as well. Some vintage machines aren't great at FMQing but most are. They are easy to repair and maintain (usually, there are exceptions) and I can bring some of my machines to the guild on sew days etc. so others can use them. They're fairly inexpensive and the quality of the machine can't be compared to today's plastic machines. I do have a few newer machines that I use for my own projects but all my charity work and scrap quilts are done with my vintage machines.