Lots of developers keep using the first version of Angular in their projects. They admit that migrating from Angular JS to Angular 2 is very hard. However, the 4th version of Angular was released in March, 2017 and it has a lot of improvements. But the question is “Do you like using Angular?” If you are not comfortable with it, then you should switch to React. You will learn React in no time as it has a simple structure. Besides, you will be able to use any other JS framework you like in combination with React, as it is a library and makes a lot of space for your decisions. If you are willing to migrate from Angular to React, you may find this page very useful.