[JRandomFreeper]

one nuclear explosion will take out all the electronics and grids in the world,

No, adequate shielding protects electronics, so it's LOS until it hits significant shielding.

Problem is that with an interconnected grid acting like a giant antenna, our one close call in 1859 (Solar flare, not a nuke, but same physics) caught telegraph wires on fire, exploded batteries, and welded keys and sounders all over the (settled) US (such as it was, then).

/johnny

[E. Pluribus Unum]

You're just like the "climate change" freaks; you think that fear-mongering and exaggeration make you so much more intelligent and caring than anyone else.

Nothing would happen to the electrical infrastructure outside of fifty miles of the blast radius. It might take a couple of days for the grid to be back to normal, but sh*t happens all the time and the world does not end.