Even now, when a landlord has a lot of available apartments they need to move or when the market is soft (for example during peak COVID), they’ll typically offer a “1 month OP.” Meaning the landlord pays the broker a 1 month’s rent fee, and the broker markets the apartment to renters as no fee. Even if the landlord just roles that into the rent, it’s a savings over the 12-15% fee standard today.
Also, landlords with larger buildings or geographic density are already figuring out that they can rent apartments cheaper with a few salaried leasing agents, instead of paying brokers. If more of them are forced to internalize the broker fee, more of them will figure that out.