If you add supply, prices do not, all else being equal, go up.
And add to that any actual residential development in SF will have affordable housing mandates regulated into it.
I don't think that there's anything that will really stop gentrification and price rises in San Francisco real estate short of the current tech boom going away. But if you're interested in mitigating it, you want new development. What feeds the short supply of housing is a large number of single-family-detached houses, especially ones that are uninhabitable in their present form, and so reward extremely wealthy all-cash buyers who can afford to pay a premium for a house, tear it down, and build anew (without the aforementioned affordable housing mandates).
And add to that any actual residential development in SF will have affordable housing mandates regulated into it.
I don't think that there's anything that will really stop gentrification and price rises in San Francisco real estate short of the current tech boom going away. But if you're interested in mitigating it, you want new development. What feeds the short supply of housing is a large number of single-family-detached houses, especially ones that are uninhabitable in their present form, and so reward extremely wealthy all-cash buyers who can afford to pay a premium for a house, tear it down, and build anew (without the aforementioned affordable housing mandates).