Yes and hopefully it won't be a thing (just something that happens enough that it's not nobody - I would walk from some of these hotels south of the airport to

Yes and hopefully it won't be a thing (just something that happens enough that it's not nobody - I would walk from some of these hotels south of the airport to the Caltrain station, and take Central Subway or walk to Moscone when I arrive at 4th and King). But the extension to downtown is attempting to make it a thing. They're hoping that people who take it downtown will take it to go anywhere that they consider downtown accessible. Part of the plan is an underground passage to the Embarcadero BART station. I think the planned budget is ridiculous but I think it would be used at least enough for it to be considered a thing.