Echo JS 0.11.0

Well, as I said, you don't have to *switch* - you can use them both, like you can do in Angular 2.

The odd thing is that we've been using "observables" since, like, forever. Of course not of the kind we have in RxJS, but we have events (the "observables") and listeners (the "subscribers"), and we lacked all the semantic syntax ofr transformation and manipulation such as map, forEach and so on. So, theoretically, it *shouldn't* be that hard to grok Observables.

But it kind of is, because of the mentioned sematic syntax which could be quite jarring from the usual procedural style.

But yes, Observables are somewhat needed. Maybe not in this form, but the concept behind them is necessary because, as I said, not everything could be achieved with a Promise.