Unpopular opinion: rent controls should be used only in times of drastic changes in housing supply or demand, and have short time limits equal to what it would take to resolve a housing crisis. Sudden change in demand or natural disaster destroys 20% of housing stock: 3-5 years of rent control. Otherwise we are just using politics to torque the market, "taking" capital from owners/landlords, and generating non-market incentives for renters. (see: master tenants, secret sub-leases, etc.)