Caltrain does not have a monopoly to get from A to B. Soon there will be a BART connection from SF to SJ. So for those traveling the full route, there will be c

Caltrain does not have a monopoly to get from A to B. Soon there will be a BART connection from SF to SJ. So for those traveling the full route, there will be competition via 'tracks'. For local service there is also overlap with BART on the north end, and with VTA on the south end. So, there is competition. Plus you could also drive. There are also shuttle services that are competing to move commuters, and not all of those are subsidized by employers.