John Deere believes in the Internet of Everything--as long as they have absolute control of everything. They discontinue parts and you are supposed to purchase the new model because they do not support the old one anymore. You can replace a part, but without a John Deere engineer enabling it, it will not work. One farmer said that when his tractor breaks down it costs him a thousand dollars just to load it onto a truck, not to mention the rest of the charges, and they cannot be fixed in a timely fashion, so they are trying to hack the tractors so they can fix them quickly and inexpensively. There is also a legal Right to Repair battle and Microsoft and Apple sent representatives claiming this was a bad move.