The JavaScript ecosystem is very dynamic. New tools and libraries pop up regularly, each one a little different from the rest, and the user has a wide selection to pick from. Frameworks are no exception.
React has already hit the point of being mainstream and is used by a number of large companies including, of course, Facebook, but also Netflix, AirBNB, DropBox, IMDb, PayPal, Tesla Motors, Walmart and many others. Pretty good company to keep! There is a robust ecosystem to support it with tools, support, and experienced developers. And, of course, there is its Facebook parentage.