I'd guess that it is actually the other way around than you might expect. First there was an affordability problem so everyone was pushed into rentals, then the renters were a big enough political block to soft-seize the houses from the landlords.

So I'd anticipate places with tenants rights laws to associate with huge amounts of housing inventory while the incentives really catch up. Then the tenants get pushed to move somewhere else and the laws go away as the renting bloc loses numbers.