Vehicles, data centers, and electronics would be untouched. Solar storm induces currents in long conductors like electrical grid and internet cables. Internet cables being problem is a new thing; I'm sort of surprised since I would expect water and earth to protect them. The big danger is that it will destroy a lot of transformers and those are hard to replace.

My impression is that it is relatively easy to protect the electrical grid by grounding everything.

Also, Carrington event is predictable once the flare happens. The electrical grid can be shut down, and shouldn't be damaged much when shut down. Doing the cold start would be a challenge. As would be making the decision to shut down the grid.