Earlier quoted context omitted.
More expensive and a pain to go to the conference. I guess that's a big part of why they're attempting to extend CalTrain to Salesforce Transit Center at a ridiculous per-mile cost.
But aren’t most conference attendees from out of town? My guess is either shrinking demand for the conference (vs the cost) and or location desirability.
One option for commuting conferencegoers is to take transit into the conference to beat the traffic and take Uber or Lyft back after having dinner near the conference, when there is less traffic. Except some would take it on the way back as well because the traffic got them to familiarize themselves with public transit.