I’m not sufficiently familiar with the geography of SF or LA – how does the door-to-door time and cost compare when you account for the fact that most trips don’t actually start and end at an airport? I’d much rather catch a sleeper bus/train in the city centre in the evening, sleep for 7–8 hours (something I’d be doing anyway) and wake up in another city centre the next morning with a full day ahead of me than deal with the hassle of travelling to an airport, going through security, killing time at the gate, and travelling back to the city centre at my destination.