I am not an expert in California but I don't love this concept in general. Here in New York, the Governor is attempting to drive higher housing density in certain places regardless of what the local people think and want. I think this is a sort of obvious effort at a form of gerrymandering - if the assumption is that the residents of higher-density dwellings are more likely to vote Democrat on average vs the current…
It will let more people afford to live close to one of the world's great cities though, instead of moving to a lower opportunity area like Jacksonville.