[whatyoucantsay]

I'd much rather work with a developer proficient with C, Java, JS, React, DDD and a deep knowledge of Unix than someone who has spent the majority of their time on JS, Backbone/Knockout/Angular/Ember/React/Vue/Mithril, Redux/MobX/Vuex and Grunt/Gulp/Brunch/Webpack.

Knowing how a technology works is important. Knowing technologies needed to accomplish tasks to be done is important. Knowing seven different technologies that accomplish the same thing is at best a marginal benefit.

[tuesdayrain]

Your entire JS ecosystem should be narrowed down to React, Webpack, and maybe Redux. Easy

[whatyoucantsay]

My "JS ecosystem" no longer includes any of those three.