Yes, there were gazillions of them made. But gazillions were also destroyed over the years by dealers. Did you know that for many, many years Singer salesmen were required to destroy every trade in machine? Think about that. There were thousands of Singer stores, and every one of them had a mountain of destroyed machines out back.
The end of cast iron sewing machines won't happen in our lifetime, or our childrens', but it will happen someday. I just will not advocate anything that helps it along. I don't want to own them all but I do want to save as many as possible from becoming anything they aren't supposed to be.
Cari