Have used Ember since early 2012 (just when it transitioned from SproutCore). Fairly large application (~80 routes, ~60 models). ## Stability Overall very well

Have used Ember since early 2012 (just when it transitioned from SproutCore). Fairly large application (~80 routes, ~60 models). ## Stability Overall very well, we've never done any rewrite (apart from a coffee-script -> JS conversion, but that had nothing to do with Ember). ## Updates Upgrades has been easily, except for the early days. But since 1.5 or so it's worked really well. ## Addons There is a lot of power in the Ember ecosystem, but it also stays away from some things (widgets etc) which I think is great. For, say, a date-picker you'd use an addon (https://www.emberaddons.com/?query=date https://www.emberaddons.com/?query=date) or build something yourself. ## Progress Despite having used the framework for several years it's still very modern. Ember has done a good job of keeping up with new technologies without causing unnecessary pain for developers. ES6 modules, good alignment with web-components, ES6 classes, modern tooling etc. None of this wasn't in place in 2012, but Ember has managed to bring it all on board without causing upgrade issues or painful breaking changes.