With the population growing nearly as fast as New York rent, more and more people are looking to live outside of Manhattan. At first, this wasn't too much of an inconvenience. Williamsburg and Astoria, two of the earliest gentrified neighborhoods of the new century, are only a handful of subway stops away from the city center. But college grads and newcomers alike are beginning to see that the L train doesn't stop at Lorimer and that, apparently, the Z train is a real thing.
Gentrification takes longer than your sort-of-racist-if-you-think-about-it hipster friend may lead you to believe. Just because there's a sign informing you that Whole Foods is coming in Spring 2015 doesn't make a neighborhood "the new Manhattan".
Chances are that shady drug dealer on the corner is actually a shady drug dealer and not an NYU music major recording ambient sound for his newest multimedia aural experience. At least for now. This urban sprawl is going to increase exponentially with time. If you find yourself one day commuting to midtown from suburban Philadelphia, maybe New York isn't the city for you.