I only have 2 machines because I do not have room for any more. In my sewing room nor in my closets. I have one set up
for piecing. And one set up for machine embroidery. I can work on a couple different projects this way. Depending what I feel like doing, piecing or embroidering. My Bernina is so heavy it was becoming a chore to change it over and adding the module. Simpler to set up two machines. They use different needles, bobbins and bobbin thread. This way it is less
confusing changing everything over. Really saves a lot of time as well. My muscles just aren't what they used to be. LOL