Combine it with laws that protect a decent standard for apartments and make it much harder to kick tenants out without a good reason. I.e. enforce basic tenant

Combine it with laws that protect a decent standard for apartments and make it much harder to kick tenants out without a good reason. I.e. enforce basic tenants' protection instead of worrying about what incentives landlords have. It shouldn't matter whether the landlord wants to take a unit off the market if the tenants aren't willing or can't move. Then it lies on the landlord to create an incentive for tenants to move out, for example by extracting less rent from uncontrolled units to make them more affordable. Another good idea is for tenants to unionize and share the legal costs of e.g. questioning the legitimacy of a lease termination or challenging sub-standard living conditions.