Counterpoint: ReactJS solves a lot of engineers' problems in a clean and elegant way. Even if it goes away, the ideas behind it will continue to be good ones.
There's nothing wrong with Haskell, but I think that a lot of people mythologize it because it's not used by many people and has an air of academia. A lot of people do the opposite to ReactJS because it's a popular framework that a lot of people use. It has no mythos. Of course, mythos is orthogonal to actually having practical, useful ideas.
