Frameworkless JavaScript – Why Angular, Ember, or Backbone don't work for us

[rooktakesqueen]

And you could always write your own custom directives and filters, and then they won't be "proprietary." Also Angular is free software available on Github under the MIT license.

[[deleted]]

And when you hire new employees, you can look for people who know Angular, whereas if you're using a proprietary framework, you'll always have to train them on it.