Since this is California law, it helps tremendously in places like LA which were built as large suburban SFH neighborhoods but have long exhausted all free space. Building denser housing within existing SFH neighborhoods will help to alleviate the housing crisis.
Exactly, rather than sending people farther and farther out of county, it lets LA's existing, sprawling suburbs look a tiny bit more like a real city.
Anything but building significantly upwards, amirite?
The second law adds ability to replace parking spaces with ADU's, which could be useful even in more denser metro areas.