Pre ~ 2023 the party line was 'we don't need to do anything in generation/distribution infrastructure, we just need to roll out more chargers'. With hints or even promises of REDUCED electric rates, not increased rates.
Search seems to be prioritizing more recent articles, so harder to find references, but there are plenty out there. I remember reading dozens of articles at the time which all insisted that costs would stay the same or go down, and we didn't need to make more generation capacity because EV use would never be a meaningful portion of electrical demand.
"In addition, by including new rate structures in the pilot programs, California may be able to shift load in ways that defers expensive new generation or transmissions assets. This remains to be seen, but could result in lower rates overall." [https://www.csis.org/analysis/utility-involvement-electric-v...]
Here is the California Legislative bill passed on the topic in 2022 - and the focus is on building more chargers. [https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml...]
Here is also the mandate to increase more charging infrastructure too, and assess effectiveness. [https://www.energy.ca.gov/data-reports/reports/electric-vehi...]
By 2022, they were trying to get folks to switch to grid controlled charging [https://www.canarymedia.com/articles/ev-charging/new-califor...] which is a bit crazy for the end consumer, and could even be a large scale safety issue. Essentially centralized rationing.
In 2023 is when supply/demand issues got so obvious that people started to call BS [https://calmatters.org/environment/2023/01/california-electr...].
Notably, around then is also when the Diablo Canyon nuclear plant decommissioning got canned (despite it being past it's design life, with known and expensive to remediate radiation leaks).
Seattle doesn't need AC, but a lot of housing does have electric baseboard heating. Those folks would definitely notice if electricity ~quadrupled in cost!