> If California somehow repealed Prop 13...
In November 2020, California scaled back on some of the benefits of Prop 13 for families. Prior to Prop 19, properties could pass from parents to children and the property tax basis would not increase. Now, the benefit is limited to the parents' primary residence, the inheriting child or children need to reside in the property for one year as their primary residence, and the amount excluded from reassessment is limited to $1m.
The main proponents of Prop 19 were realtors who expected the change to result in more sales of properties after parents die. I haven't seen data on it, but they were probably right. There will probably be more sales as children who inherit their parents' properties can't afford to keep them after reassessment.
Prop 19 was titled the "The Home Protection for Seniors, Severely Disabled, Families, and Victims of Wildfire or Natural Disasters Act" because it allowed seniors and victims of wildfires to sell a home and buy a new one anywhere in the state and carry over their current property tax assessment, regardless of the sale price. However, it totally undermined one of the best ways for families to pass wealth on to their children, the acquisition of properties for investment. Corporations, of course, were unaffected.