I personally agree the problem's being overblown here, and I agree with what you say about technology like that, but, just to counter a bit, when it comes to agriculture, time's not always available. Depending on when that theoretical stopping of Deere's servers were to occur. There could be massive crop failures. It's all well and good to get everything back up again, but by this time a loaf of bread costs $50 and everyone's flipping their shit.

Not that I think any of this is ever likely to happen, but even small disruptions to the food supply can have large consequences.