It's a blog post with a bit too many pictures, but the gist is:

This is the other way new living space is carved out of a wildly overpriced city. It works because it doesn’t exist on paper and the authorities haven’t yet discovered all the ways it violates a thousand cherished regulations.

Since housing costs so much (in the SF Bay Area), people are (illegally) living in buildings which aren't supposed to be used as housing.

But this eventually leads to situations like the 2016 Ghost Ship warehouse fire.

Housing for Ukrainians? Are these people serious? They think this is a good thing to brag about right now? With all the homelessness and housing troubles in the United States we’re building housing to give it to people who don’t even live here? How is that going to help housing? It’s a net 0