That’s not success, that’s picking winners and losers. Same as with SF Bay Area, Santa Monica (in LA) and any other place with rent control - being in place early makes you a winner. Finding a vacant rent stabilized place is like winning a lottery. Problem is what do you do with young people that should be moving out, or moving to the city for school?
Only real answer to housing is to build more of it. Else, you force people to move, pay more and/or cram ever more bodies into the same space. The latter is also what makes poor much more vulnerable, and not just in the pandemic.