Metro-North, the commuter rail line that runs from New York to Connecticut, is ordering a new fleet of cars to replace the 1970s models now in service. That’s great news, until you talk to the regulars in the bar cars that are unique to the New Haven line. The rolling lounge, with its leather benches, stools, cup holders, and of course a bar, may not be a part of the new fleet. It’s an expensive customization that Metro-North will not commit to yet and the existing bar cars can’t be hooked up with the new cars.  For passengers more interested in a nap and pleasant environment,  the new cars finally have the headrests and improved restrooms that other lines have been enjoying for years.  There will also be power plugs, but alas no Internet access.