> the 9-county Bay Area which is smaller, in population, than NYC despite having more than 20 times the land area.
LIRR, NJ Transit, Metro-North and the Port Authority easily cover more land than the Bay Area – note that these are all state-run agencies. AFAIK California has never taken an interest in creating its own state level transit agencies? The states of New York, New Jersey and Connecticut and the city of New York have been able to cooperate perhaps much better than SF and its surrounding counties.
> AFAIK California has never taken an interest in creating its own state level transit agencies?
It has (e.g., through longstanding cooperation with Amtrak, and more recently through the High-Speed Rail Authority), but not of the same style as those centered around New York or Boston, because California doesn't have any metropolitan areas like New York or Boston to support (even like New York or Boston before they had developed their strong coordinated public transit systems.)
California's urban areas are nothing like New York or Boston in density. Sure, the New York-centered services may cover a land area comparable to the Bay Area -- but the reason for an intense transit system in that area is that there are a lot more people there. New York City alone, has more people than the entire 9-county Bay Area has spread out over 7,000 square miles.
And, of course, while New York City is clearly the economically dominant metropolitan area of New York State (and politically dominant in the State, as the City itself has nearly half the State's population) and a considerable center of gravity even for surrounding states, and Boston has a similar role -- that the city itself isn't so much of the state, the metro area is -- in Massachusetts, the Bay Area isn't the dominant region in California, by population, economic power (despite being pretty strong in per capita wealth), or political influence.
What about it? I've never heard it described as a better internal transit system than the Bay Area has, just a better system as part of the multi-authority feeder into the transit system for the New York City metroplex.
If there was an adjacent New York City-scale metroplex into which the Bay Area fed, it would have very different transportation demands and needs -- and likely a very different transit system -- than it does.
Is BART an "internal" transit system and not a feeder system to/from SF?
NJ Transit is not solely a feeder system into NYC (that's what PATH is for), though that's probably most of it: https://www.njtransit.com/pdf/rail/Rail_System_Map.pdf . Is Oakland not analogous to Newark in this system?
LIRR, NJ Transit, Metro-North and the Port Authority easily cover more land than the Bay Area – note that these are all state-run agencies. AFAIK California has never taken an interest in creating its own state level transit agencies? The states of New York, New Jersey and Connecticut and the city of New York have been able to cooperate perhaps much better than SF and its surrounding counties.