Also how bad the Berlin government is and has always been. It's almost a crime how they sold almost all the public housing to private investors. The outcome of this has been slow regression of Berlin. From an interesting and pioneering artist haven to a boring and ugly catastrophe. Like, what's really left when all the interesting things are gone?

Money and jobs. But yes, the government really took cheap housing for granted and made no effort to keep it that way. Actually they took measures to destroy unused housing. But that's government for you. Even left-wing government hates cheap housing.