[91bananas]

Just coming here to give Backbone.js some credit. It is one of the most mature of the frontend frameworks, because it does almost nothing. It's what I'd call feature complete, its core probably will not change or grow much from here (in a good way). jQuery and Underscore back it, which also aren't changing or going anywhere. And as another commenter point out, it's 5 years old already, still in production all over the place.