Is Backbone.js dead? How many of you still use this framework?

Backbone.js is one of the first popular JavaScript frameworks the web had seen. A few years ago, it was on extremely high demand and an employer would do anything to hire a good BackboneJS developer.

However, things have changed now with the emergence of Angular, Aurelia, React, Polymer, etc. Will you use Backbone.js today? If yes, what makes you do so?