Ember is going to be 5 years old this year and has a team dedicated to backwards compatibility. It's the least "churn" of the frameworks. And the government co

Ember is going to be 5 years old this year and has a team dedicated to backwards compatibility. It's the least "churn" of the frameworks. And the government could just choose not to use any third party framework. But to prove your point, people are moving to React, not Angular :-) jQuery is used in almost all Angular apps anyway.