The more I spoke to cab drivers the more it seemed their industry was a pyramid scheme aimed at helping established rent-seeker take advantage of often poor new immigrants. Uber brought a breeze of fresh air: Someone could simply buy a car, calculate the depreciation and it's value on the market (since unlike medallions cars are relatively liquid assets!) do rideshare and calculate their profits or loss. They can get out of the game at anytime, and they know exactly how much they are going to get for the car they have should they sell it.
And I'm not even touching the usual pain points and often discriminatory practices of medallion drivers (refusing card payments, refusing rides to non-white passengers and to non-white neighborhoods...).