It’s still easy to point at prop 13. It prevents all manner of people from moving or do other things so they can keep the current tax rate. I would love to move from our smallish home, but our current effective tax rate is 0.70% dropping since we purchased 5 years ago. Our property tax would practically double if we moved so best we can do is expand the home. But in doing this I have now priced my smaller home into a bigger home taking it out of reach of someone wanting a smaller home.
You can afford to pay more for a larger home but can't afford double the tax? That doesn't make sense. The mortgage jump should be a bit a lot more than the taxes considering market moves.
I think the new tax regime has more to do with tax unaffordability than the actual tax rate.