"Disruptive" is one of these new buzzwords being bandied about these days, and to some extent, it has value. We are seeing a change (the "sea change" that the dot-com people predicted in the 1990's. This "new paradigm" is about 20 years late, though!) in how our society functions. Much ink (again digital - another new paradigm) has been spilled about how malls are closing and Sears is on the rocks - as if we didn't see this coming in slow motion over the last decade.
Anyway, New York gave in, after they realized that the cabs weren't about to serve the needs of all of the citizens of the city. So "black cars" were allowed, but had to be called, not hailed. You either knew the name of the driver, or called the number written on the side of the cab. When cell phones became popular, this accelerated the trend.
Maybe there is a common denominator to this "Millennial" label that defines them as a generation - they were born with smart phones in their hands. And the smart phone has turned out to be more addictive than opiates. You've seen the type, usually young, usually female, obsessively texting on the phone and ignoring all else. And you've seen them drive. One 20-something apparently killed off an entire church-bus filled with elderly people by hitting them head-on with his quad-cab dually pickup - apparently while texting.