I guess I'm just marginally more sanguine than you are that issues related to infrastructure and logistics could be, eventually, worked around. There would stil

I guess I'm just marginally more sanguine than you are that issues related to infrastructure and logistics could be, eventually, worked around. There would still be ways to contact people over a distance, some of which would remain available even in the initial chaos. Further, there are many people still working today who worked before internet-connected-everything, so there may still be useful institutional knowledge to bring to bear on these new problems. My point on the iPhone was about what would happen after telephony infrastructure and supply chains had recovered (however long that takes). In the immediate aftermath of the shutdown mobile phones would absolutely lose the ability to make or receive calls. But again, I expect this to recover somewhat after a few months. Your point on hospitals not being able to order supplies is a good one, regardless. Without blood supplies or dialysis equipment (or a bunch of other things), people would absolutely die. Perhaps those first weeks would be deadlier than I anticipated.