That implies you also ensure that they monitoring system is isolated from the control system. No one can be bothered to do that, and no one wants to spend the money on an extra microcontroller (a tiny fraction of the cost of each unit, but it comes straight out of your margin because no one pays extra for security).

> Who ever thought it was OK to control freezers over the internet should be hung.

I've got really bad news for you about how many critical systems are connected to the Internet.

Analytics are very different from controls. People who model them the same tend to suffer. A lot of academics and project managers don't understand this unfortunately.