I remember seeing a pie chart somewhere about how many people are still benefitting from low Prop 13 taxes, but I can’t find it. It was low. I did come across this.
Since the measure passed, the assessed value of homeowner property has grown at an average of 8.1% per year, and assessed value of non‐homeowner property subject to Proposition 13 has grown an average of 8.4% per year, according to data from the California State Board of Equalization, specifically Page 11 through 14 or so.
Edit: On average, 20% of all Californians move every month and the proposition was passed over 30 years ago. 8% of San Diego County homeowners who are at that original 1978 rate.