But it's still sprawl. Yes, there's cities that can still sprawl more, but building sprawl is not the same thing as building a new city. You're just building a place for people to sleep while they work somewhere else.

You have to build something self sustaining and that requires jobs in the new city. You can't just have a connection to an existing city. You need an industry or institution or something there to attract workers and the workers to support those workers.