[procarch2019]

I get what you're saying and that could very well be the case, but I think the 'pipeline' as a whole requires a lot of handshaking between the different stations. They would not be able to do this without their supervisory control later (or at least it would be particularly difficult). That alone could have caused them to shut it down.

Additionally, if there was a whiff of malicious software or unintended access I would imagine they would want to make sure it didn't get into other systems. That would involve isolating and possibly shutting down machines and equipment.

I guess we'll see when they release more information. I would imagine that we'll get more details since this is critical infrastructure.