In the works- Federal Legisltation

Biden Infrastructure Plan Addresses Housing Inequity & Exclusionary Zoning
Within the recently released $2 trillion infrastructure plan  is more than $5 billion in block grants to  cities that address exclusionary zoning laws , like single-family zoning and other land use planning tools – minimum lot sizes, mandatory parking requirements, and prohibitions on multifamily housing –  that have locked families out of areas with more opportunities.
So there's this carrot for Covid-strapped city budgets throughout California to reassess this type of zoning; a national movement could hasten what California cities like Berkeley and Sacramento have already begun.

What kind of community could you assemble if you could build ADUs, duplexes or triplexes on residential parcels anywhere?

Biden is calling on Congress to enact an innovative, new competitive grant program that awards flexible and attractive funding to jurisdictions that take concrete steps to eliminate such needless barriers to producing affordable housing. See more  in the news about Exclusionary Zoning changes here.