I don't think it's as much "a React in every stack" as "observables solve a lot of problems that couldn't previously be solved with promises." Handling async e

I don't think it's as much "a React in every stack" as "observables solve a lot of problems that couldn't previously be solved with promises." Handling async events can be difficult and error probe. Observables finally provide a useful pattern to that can be used to effectively manage async operations on data. React os the poster child because it came first but Angular2 also uses Rxjs (ie Reactive Extensions for JS). The poster goes to the opposite extreme, "if we're doing functional programming in JS, everything should be functional. Here's what I use, everybody who doesn't also use it is dumb." Subjective opinion addressed as fact.