I'm not sure this comment is very useful. It is much too generic. Look at most "old cities" (think Hanseatic era) in Western Europe. Over 10 floors is a huge residential building in central, old areas. Residential buildings in the central arrondissements in Paris are rarely more than 5-6 floors. Same for London. Same for Hamburg. Same for Amsterdam.

The only place in San Francisco that has many residential buildings more than 3-4 floors and is building more/new is SoMa (South of Market) and Rincon Hill. (I have not lived there for 10+ years, so please correct me if I am wrong.) Sure there are some odd ducks in Russian Hill or Nob Hill, but they are from 1960s/70s. Nothing new is built there now, except billionaires doing a tear-down/re-build.

Wild idea: What if we build 4x fifty story apartment blocks on those four blocks that I mentioned at Mission District BART stations? You could do stuff like bottom 3-5 floors are all retail (small biz plus chains), then next 30 floors are middle class housing, and the upper floors are unlimited for the rich. I think it would be a good mix. The hardest part of the build might be creating enough car parking spots for the luxury units at the top. We might need to do something bizarre/exotic underground, or buy adjacent lots to tear-down for a multi-story parking lot. To be clear: I am not excited about building new parking garages in 2020s in urban San Francisco, but it is a reasonable compromise for selling luxury units at the top of the tower. All together, this mega project could be easily a 1B USD build. Another bonus: One floor in one tower near the top could be reserved as an observation deck/floor. That would be very cool, like a modern Coit Tower for the 2020s.