I, too have many backup machines.... With age comes wisdom..... that's a good thing. When I started sewing over 60 years ago we had one machine. When a new wife, I thought I needed a fancy $$$$ machine. Now, I still have a couple of the fancy ones but my trusted vintage machines are my go-to favorites. And the fact that I can fix them and keep them running so beautifully makes each one a special one. I think I have 14-15 machines, the oldest dating back into the 1870s. With that many machines I can have one set up with a walking foot, one with a darning foot, one just for binding..... etc. Yes, backup machines are a must.