I don’t think power reliability should be a concern... except for when the big one strikes. But in that case all the freeway overpasses will collapse, so an ICE car won’t help you anyway.
In the Bay Area, it's regularly an occurrence where people in the Santa Cruz Mountains will not have power for 2 days to a week. With little to no notice too.
You come home with a low battery to refill it at home, you might not be able to get very far. Hopefully you just drive with 50+ miles ready all the time.
Unless I someday get to live somewhere with a very substantial solar system, I won't ever be with only an electric car. Grid-delivered electricity isn't reliable enough to bet on.
And consider storms like hurricanes Irma and Maria which left many areas of the Caribbean without power for multiple months.
That said I also remember a hurricane (Harvey?) which shut down refineries, making gasoline scarce. So it's pick your poison.
I lived in SoCal for 24 years and the only major(>3 hours) power outage I remember was https://en.wikipedia.org/wiki/2011_Southwest_blackout and IIRC it lasted less than a day. That said, a major seismic event could occur anywhere in CA and cause outages for much longer than that.
PG&E's safety outages are a fact of life of living in California