Here's a great bit from the Mercury News' Mr. Roadshow's column. I have experienced this a few times (not including big event trips like this one):
Q People whining about not getting a seat on BART haven't ridden on Caltrain lately. At least BART gives straps and poles to hang onto and the train rides are pretty smooth. Caltrain is often standing-room-only for an hour or more and passengers have to grab whatever they can find, including other people. The older Caltrain cars are 100 times bumpier than BART. A lot of people sit on the filthy floor because they don't have the strength to stand up for that long.
A Forget wearing a suit. This is scruffy blue jeans territory.
Of course, spending billions of dollars in the Central Valley on High-cost Rail makes total sense, right?