Framework · 2011–2020 · Cloud Scale
Ember.js
Convention-over-configuration SPA framework. LinkedIn and Discourse kept the faith; everyone else went React.
Why Ember.js faded
Ember faded because it optimized for long-lived enterprise SPAs while the market wanted hireable React freelancers. It was opinionated in the right ways but shipped heavy defaults in the era of bundle-size audits. Survivors swear by it; newcomers never arrive.
Case studies
Patterns

Compare with
Related
Framework · 2010–2021
AngularJS (1.x)
Two-way binding magic that became a migration tax. Angular 2+ was a rewrite; the 1.x apps lingered for years.
Framework · 2010–2016
Backbone.js
Minimal structure for early client MVC. Taught the browser to think in models before React rewrote the rules.
Framework · 2013–now
React
Components and unidirectional data. Won the front-end by being good enough and having a gravitational ecosystem.