Uber and Lyft fares are unsustainably low right now, and at their current prices, they depress public transit interest and ridership. But what happens in 5 years when these ride sharing companies need to turn a profit? Self driving cars is potentially a solution, I suppose, but will it be ready at that scale by then?
Not only that, but in the meantime, they may be causing more environmental harm than good: https://www.citylab.com/transportation/2018/04/how-uber-and-...