A lot of the California bills had various poison pills in them that reduced their effectiveness.

For example, SB684 allowed building and subdividing up to 10 units on a multifamily lot. BUT, the lot wasn’t eligible if you had to knock down a building that had tenants in the past N years to avoid displacement of people.

You can probably guess how many multifamily lots are out there where you don’t have to tear down an existing building with tenants.

There are other issues too. Interest rates and tariffs make a lot of projects not viable financially.