There are inherent performance disadvantages, including time-to-first-paint. Facebook using React makes a lot more sense than your average business website, bec

There are inherent performance disadvantages, including time-to-first-paint. Facebook using React makes a lot more sense than your average business website, because Facebook has a lot of dynamic content, with a complex interface. There are definitely ways to improve performance, but only Google and Facebook seem to pull off real performance with these kinds of tools.