According to the TC39 ECMA262’s repo [1] (ECMA262 is a committee responsible for planning and creating new syntax that goes into JavaScript) Observables haven’t been brought up at a meeting in over three years and they are still at stage one of the four stage process. I’m not saying there’s not hope I’m just wondering if it will end up happening. Either way I’m fine with or without Observables as async iterators, Node streams, and WHATWG streams are already pretty powerful. In fact the creator of RxJS made a library based off iterators called IxJS that looks interesting and hopefully eventually iterators in JS will have iterator helpers [2] where you can chain things off of them (currently stage two and last talked about last year). Also another thing to keep your eye on in the standards process could possibly be emitter [3] it’s also stage 1 (like Observable) but was talked about last year as a kind of push based replacement for Subjects in RxJS/Observable land.