[arms]

There are a bunch of factors in play here, but I'd guess that the reasons are mainly two-fold: a) developers like shiny new things (myself included) and b) Angular and React offer opinions on how to build front-end apps, which can be very hard.

Angular and Ember never quite did it for me. I don't agree with all the design decisions they've made. I do however enjoy using React a lot. It fits my mental model much better when it comes to building front-end apps. It's simple to learn, focuses on building modular components and I really like how it manages state (either via components or Flux/Redux.) That said, it's not something I use for every project. But I had something that just wouldn't work as a traditional server-side rendered project and React was a godsend.

I'm hopeful that ClojureScript continues to gain traction and improved tooling. I really like the language, and feel that it offers enough to replace JS for most of my needs. I've played with Reagent and _really_ liked what I saw there.