It's the year 2032, and Wings, Jack Dorsey's self-driving taxi service, is a hit. Because Wings doesn't have to pay human drivers, most of their rides are free.

It's the year 2032, and Wings, Jack Dorsey's self-driving taxi service, is a hit. Because Wings doesn't have to pay human drivers, most of their rides are free. The company makes money by showing ads during rides and selling data about users's movement habits. Wings is not profitable yet, but revenue is through the roof, and the company is expected to IPO for a zillion dollars. Unfortunately, Wings's self-driving AI is much likely to destroy property than a human driver. As a result, some members of the public have called for every Wings car to be remotely controlled by a human. However, others push back. Employing good human drivers would be nearly impossible at the scale of Wings. Here is an interview with a poor grandmother who relies on Wings to see her family, and here's how a nonprofit uses Wings to find homes for lost puppies. You don't really don't want to go back to paid Uber and Lyft rides, do you? There are a couple of problems with this analogy. But the core point is this—if a company can't sustain a key aspect of their business at scale, then perhaps they shouldn't be able to scale.