1. No new rent control leases since 1973 (IIRC) although you can inherit a rent control apartment if you've lived there for two years. I'm sure this system is abused but the SF equivalent is a huge number of units being left vacant largely due to rent control;
2. Exit clauses on rent stabilised apartments for the rent getting too high or the occupant earning too much. The rent part is abused since between tenants you're allowed to raise the rent by 1/40th or 1/50th (I forget which) of the cost of capital improvements, which leads to renovating the kitchen/bathroom and probably overstating the cost; and
3. Most importantly, NYC has new construction, even in Manhattan.
What SF really needs more than micro-apartments is:
1. A gradual phase-out of rent control including income-based assessments; and
2. More importantly, some kind of plan that allows for new construction.
As much as I like the weather in the Bay Area, between this and public transport (NYC subways and comparatively cheap taxis > BART+Caltrain+munibus) I'm glad I live in NYC. In lots of ways I think it's got a lot going for it in terms of doing a startup here too.