The company I work for has their CAM manufacturing calculations run through excel. The non technical director has calculated every possible route line required

The company I work for has their CAM manufacturing calculations run through excel. The non technical director has calculated every possible route line required for our CNC process. This is something that would be very hard to do in a conventional programming language. He did it with no coding background and it's one of the most maintainable pieces of software in the business. It's all laid out in front of you. If they need a diagram to explain something, it's there inline. There are no unreadable long nested if statements. He didn't even know you could nest them. It is truly amazing, I've not seen anything like it. I've seen plenty of train wrecks where people try to run other parts of the business through excel.