Single-room occupancy (SRO) housing was effectively outlawed by tenant protection laws. The only way that housing with shared facilities can possibly work is when the landlord enforces strict rules and immediately evicts tenants who misbehave by making a mess, hassling other tenants, or not paying their rent. But in many cities it can literally take years to evict a tenant, and the city will even pay for legal aid for the tenant to fight it in court. This reduces rental housing availability and increases prices for everyone.