"allowing you to have some pages that use it and others that don't" Your response seems to dig into a different (though related) issue. If the question is whet

"allowing you to have some pages that use it and others that don't" Your response seems to dig into a different (though related) issue. If the question is whether, given a whole website, whether angular/ember can exist only on certain pages, but not all pages, then the answer is Yes.