Originally Posted by
Kacee
Not much reason really to connect A-G directly from the airport's perspective, as the only reason to cross from A to G is to use a lounge. Even a T1-G or T3-A connection would be extremely rare.
Originally Posted by
dhuey
Yes, aside from lounge visits, I doubt there will be much traffic between A and G.
While I agree with the above world view according to FlyerTalk, let's not forget that most travelers do not have or care so much about lounge access and could benefit from easier and faster access between T1-G and T3-A, etc. to visit their favorite shops, F&B outlets, and art exhibits, etc. This is especially true for those with special interests and/or dietary needs and preferences, e.g. vegan/vegetarian food options in selected few venues.
Since SFO is arranged in a circular instead of straight line configuration, I would argue that it isn't fully connected airside until A-G is connected.