I've worked on IoT products where we've deployed fleets of thousands of devices without user interfaces placed all over the world in random, inaccessible places, hanging off cellular radios. We're definitely not managing those manually. Architecting management systems for that is always interesting. Sometimes the question would come up, "why don't we do X?" where X necessarily included the ability to brick the entire fleet (and probably kill the company) in 5 minutes. My philosophy was that certain things are too dangerous to exist, no matter how useful they might be.