I live in the Bay Area as well but have lived decades in the Midwest and east coast as well. If you think california is representative of what living/driving in other parts of the country is like…
Also ppf and ceramic coatings and/or other such products are entirely different things. Maybe you’re confused because both types of product say “protection”. One is primarily about physician protection (scratches, rock chips, etc). The other is primarily chemical protection and enhancement (hydrophobic properties, gloss, etc).
Comparing the two is like comparing a bullet proof vest and a raincoat. Neither is good at the job of the other.