Comment: Yes, the rent control really scares me.  I think that has the highest risk of serious unintended consequences.

I get that landlords shouldn't be gauging tenants with insane rent increases.  But they also need to be able to recoup their costs, have the $$$ necessary to invest in the buildings, and (GASP) make a reasonable profit.  If they can't do these things, then either the building becomes a slum, or they get out of the business... and the supply of rental housing diminishes.