Sure, but isn't that happening anyway? Not necessaarily, no. The example of Vienna has already been brought up, where the city outright owns something like 1/4

Sure, but isn't that happening anyway? Not necessaarily, no. The example of Vienna has already been brought up, where the city outright owns something like 1/4 of of all rented flats, and (as of 2017), about 2/3 of all citizen live in municipal or publicly subsidised housing. There are reason why it's considered one of the most livable cities in the world.