One of the main purposes behind migration is to increase AngularJS code efficiency. It makes the development process more efficient. Lowers the development cycle time, allowing you to spend less (than if you used AngularJS) yet produce greater results. Comparing Angularjs and Angular components, you will see the latter is more mobile friendly, provides smooth updates, and has faster & efficient development cycles, which are all significant reasons why you should switch to it. Moreover, choosing Angular elements means typescript module integration which gives access to ES6 & ES7 features in the project.