I think the whole below sea level thing would kinda make it hard for them to live with subways.... And there aren't many tunnels in general... ((You did notice that was a hyper link, right?)) And maybe New Yorkers would be used to tunnels would be used to it, but not many Texans.. it would just be weird to live in a tunnel for any extended period of time. As far as I know, not a single person in Texas has a basement, either.