The map still amusingly mostly pretends that New Jersey and transit running into New Jersey doesn’t exist. For example, the PATH is very faintly represented but yet the JFK AirTrain (which isn’t part of the subway and the airport isn’t run by the MTA) is given more prominent status. PATH is owned by the same entity (PANYNJ) that owns the AirTrain but is nearly hidden on the map because it goes to New Jersey.
Back when the SuperBowl was in NYC there was a full transmit map produced that acknowledged and displayed the existence of New Jersey and its transit into and out of NYC. After the Super Bowl the MTA quickly took it down and New Jersey was returned to its former “we’re gonna pretend like you don’t exist” map.
This is an MTA map, not a general “transit” map. Having the AirTrain on it is a bit of a bonus, but probably reflects (a) it being the most common question MTA gets and (b) it being more integrated with the rest of the MTA system than PATH (use of metrocard, etc).
Note that JFK airport is already within the regular bounds of the map; it doesn't require anything to be shifted to include that information.
New Jersey requires the map to be shifted to include it, which means either going to a larger map, or shrinking the existing content of the map. There's a cost to doing so, and that cost may not be worth the extra benefits providing that information would.
Back when the SuperBowl was in NYC there was a full transmit map produced that acknowledged and displayed the existence of New Jersey and its transit into and out of NYC. After the Super Bowl the MTA quickly took it down and New Jersey was returned to its former “we’re gonna pretend like you don’t exist” map.