In California - obviously prop 13 if someone in the family plans to keep the house.
As for Proposition 13/58 inheritance, note that Proposition 19 (2020) restricted the inheritance benefit to only family homes and farms, so I don’t think inheritance is a widespread benefit anymore. Proposition 19 also made the property tax basis portable, so the increasing property tax is no longer an impediment to grandma moving.
"Whoa, hold on; we should change the law on that last point!" I hear you saying. And I might even agree, but unless/until we do, grandma is doing the obviously sensible thing by not selling while she's alive.
In this case, the federal tax treatment of inherited property (problem 1) cannot be addressed by a California state-level legislature, but the latter can try to increase the supply of housing in CA (problem 2) by making ADU sales legal there.
Helping multi-million dollar inheritances built on the housing shortage dodge taxation isn't the political winner it might have sounded like on first glance?