[generic_user]

Four to five story apartment blocks is what a large portion of SF is already. The peninsula is just very tiny and everyone wants to live there. The only large scale development that developers want to do is massive condos. Its a goldmine compared to anything more reasonable. Keep in mind this is in the USA the property developers here could give 2 craps about keeping the city an interesting and livable city.

[ghaff]

Which is why you have zoning which is what people complain about. In addition, it's a lot easier in general to find a relatively undeveloped area and build high-rise condos there than increase the height of multiple blocks of an existing neighborhood by a few stories.

There are probably areas in the Bay where you could build some sort of tech worker arcology if you really wanted to do so and spend enough money. But I doubt people would really want to live there.