The big long range use cases in California is San Jose-Tahoe (with its mountain climb reducing range), LA-SF, LA-NV & SF-SD. So you would want a supercharger for those trips.
Also for car commuting in big metros, 40-60 mile one ways are common enough, which is 120mi round trip. The previous generation of affordable EVs had 80 mi ranges, which didn't work for those metros.