Just got back from a trip last month, amazing city and I had an absolute blast. Took subway and Uber while I was there (no medallion cabs this time, but plenty in past trips). No doubt that the world-class subway system imposes substantial competitive pressure on cars in general.<p>I&#x27;d arguing that Uber has the potential to pose a disruptive threat to taxis, not subways. And to lots of transportation systems in plenty of other cities around the world.