IMO depend of the type of the project you're building. I'm using Ember because most of the project I work on right now have multiple pages, views and components

IMO depend of the type of the project you're building. I'm using Ember because most of the project I work on right now have multiple pages, views and components. Using any other library/toolset would be much harder to achieve the same results. Ember comes with a lot of things in the box, the routes is definitely a game changer compared with with others.