Commuter rail cannot exist in a vacuum without local transit. Metro North gets you into Grand Central, but most people don't work right on top of Grand Central - a supplementary transit system is necessary to get people to their actual endpoints.
The CalTrain, which is the closest SF Bay equivalent to MTA commuter trains, stops in San Francisco, but far from local mass transit connections (either MUNI light rail or BART), to the point where there is an industry for private shuttles. This is a significant barrier to the adoption of commuter rail for people who work in the city but want to live further out.
Similarly, once in the Peninsula or South Bay, the CalTrain is often not near a mass transportation connection. Some of the major tech firms are located "near" CalTrain stops, but nearness is often at automobile-scale, as opposed to walking or cycling scale.
You need a pretty-damn-good local transit solution to support commuter networks.
The CalTrain, which is the closest SF Bay equivalent to MTA commuter trains, stops in San Francisco, but far from local mass transit connections (either MUNI light rail or BART), to the point where there is an industry for private shuttles. This is a significant barrier to the adoption of commuter rail for people who work in the city but want to live further out.
Similarly, once in the Peninsula or South Bay, the CalTrain is often not near a mass transportation connection. Some of the major tech firms are located "near" CalTrain stops, but nearness is often at automobile-scale, as opposed to walking or cycling scale.
You need a pretty-damn-good local transit solution to support commuter networks.