Geomagnetic storms from coronal mass ejections will not hurt small disconnected electronics or transistor junctions. The timescale of the rate of change in the Earth's magnetic field is not short. There are not high frequency components. Only long conductors like oil pipelines, telecommuncations wires, and power lines and the backbone transformers will be effected. The integrated circuits in your smart phone will not be.
Also, like I said in the hackaday thread, in most of the ways that matter (ie, geomagnetic effect at earth) the 1989 CME that blacked out part of Canada was significantly stronger than the Carrington event. We, as Earth, haven't really added that much more long distance conductors since then. I wouldn't worry.
That isn't to say there's no danger. Certainly trying to replace the backbone transformers when the electrical infrastructure is down would be very hard. Those things take months to make, ship, and install in a well operating society. A CME that knocks out the power grid everywhere would be devastating.