I don't think you understand how an EMP works. The article is about a microwave gun which is more selective but less effective than a nuclear EMP. The pulse causes extremely high voltage. Durable electronics (an old car) might restart, but modern electronics are often destroyed.
It's not like electric devices in a big area don't work for a long amount of time.
Unless they are EMP hardened, they will not work forever, which to me is a pretty long time.
If you want a good read on the effect of a massive EMP attack, read "One Second After"[1]. William R. Forstchen wrote it after presenting to the US Congress on the dangers of EMP, and having the presentation be largely ignored.
I don't think you understand how an EMP works. The article is about a microwave gun which is more selective but less effective than a nuclear EMP. The pulse causes extremely high voltage. Durable electronics (an old car) might restart, but modern electronics are often destroyed.
It's not like electric devices in a big area don't work for a long amount of time.
Unless they are EMP hardened, they will not work forever, which to me is a pretty long time.