Farm equipment has been increasingly computerized since the late ‘80s. Today nearly the entire piece of machinery, be it a tractor, or combine, has sensors or other electronic equipment installed. Modern John Deere tractors and combines have proprietary software that is becoming pretty draconian. You might need an authorized agent to swing by and connect to the equipment with diagnostic software to repair it. The down-time can be quite costly, not to mention the technician’s $150 an hour labor bill. It’s not just John Deere, I’ve heard reports just like this with Caterpillar tracto...