The price of used ICE will go up IMO
In 15 years this should be totally doable with passenger cars as the cost of their components will have dropped significantly. Electric trucks may require more time or incentives due to the battery size and cost. What this does is draw a roadmap for car makers and their dealers, the ones wishing to stay in business.
Well that's the hope certainly.
But it's not a certainty.
Also, California already had rolling blackouts...Not sure how they'll cope with additional stuff being on the grid.
They better fix that in the meantime.