Unfortunately, these pieces could almost always be reduced to "housing costs". They address it a bit in this most recent one, but homelessness / school enrollment / natural population growth / middle class jobs / energy costs can all be traced back to the huge housing deficit that's accumulated over the past 30 or 40 years.
I just don't understand why cities in California won't let go of single unit zoning. Single unit is the most expensive and least efficient zoning rule. Getting rid of it would bring housing costs down. Ever visit a beautiful city like Paris, Copenhagen, Milan and wonder why we don't have that? It would be illegal to make the buildings they have under our zoning code and parking mandates!
Obviously housing cost is the tips of iceberg, and the result of state policy, resemblance to the development path often seen in middle and south America.