And even with that, it’s a lot more common than people think. What has to happen is the entire Bay has to flip the boat to East/south ops. This generally happens when the winds at KSFO have a tailwind component greater than 10kts from the east or a crosswind component greater than 20kts from the east. When it happens:
KSFO uses 19L/R for landing, 10L/R for departures.
KOAK uses 9L/R, 10, and 15 for landing and departures.
KSJC uses 11 and 12L/R for landing and departures.
All other airports near the area follow suit and flip the boat to accommodate the traffic flow. When you see the winds out of the east (read: 090 clockwise to 190), have a listen to the OAK or SFO LiveATC feeds, and you’ll see a lot of southbound/southeastbound IFR departures.