For example, in the framework front, you guys argued that React is way better than Angular. I don't even know what's going on with Ember.js, Vue.js (fine, I'll give that this one is very new and untested), Backbone+Marionette.

I don't see that kind of argument in the other communities.

Your build: why are you omitting Grunt? What about broccoli and bower? what about Yeoman? Bower is kind of a big deal for front-end dev.

There's no "majority" in the JS world unlike the other ecosystems.

Cuba? I heard Cuba _once_ in HN. Brooklyn and the rest? never heard.

There are bajillion newer Java "microservice" frameworks but the usage is just rounding error.

Also keep in mind that in other ecosystems, the major players are already established while in JS ecosystems, all of them are considered new/young. There is no _established_ players for each tool segment (except unit-testing where I think Mocha is better than Jasmine, unfortunately due to lack of exposure and whatnot, Jasmine is still lurking around)