Comment by galangalalgol

Air gaps are not magical, they will not stop the flood. The electrical grid has to communicate with itself to load balance, so you can run dedicated wires with giant cut-me signs pointing at it, or you can use symmetrical key encryptors to route it over the intenet. You needed to use the encryptors anyway, so why not. If bad software gets in via thumb drives music disks etc (and it will of the flood is pointed at you) it can still do bad things. But so can a hunting rifle pointed at a transformer station. That nearly blacked out all of socal once.