That's the insider joke. Look up NY1-NY4 data centers, they are all in NJ across the river. NYC just dump their shit into NJ is the usually move. But those areas are full now, and they don't really have anywhere to go but south jersey.
The AI ones are a hundred times larger. Formerly you needed a building to house racks where each customer had a few servers, now they want a megacomplex all dedicated to one purpose. Few of these are even getting completed, most are abandoned for cost reasons.