> It doesn't cap total costs, it allows 5% per year increase, it doesn't apply to new homes
If you tell everyone that you cannot increase more than 5% a year, this is used as a signal to all landlords to increase 5% a year. It's a coordination mechanism. And it helps hedge for years in which the market rent has increased by more than 5% and the landlord is unable to adjust. A commenter who is a landlord confirmed this as well.
And this will increase the incentive to build new homes. This could be good but new homes tend to be more expensive and serve the high end. Much like the median price of a new car is significantly higher than the median price of all cars on the market.
There are entire industries in New York that focus on buying units and converting them from rent stabilized/controlled to market rents through any means (direct payment, intimidation, legal, etc). To think this will somehow lower what people actually pay for housing is naive.