As you go forward, you will hear many myths that are not true in respect to Angular 2 or upgrading to Angular 4. One of the most common is the Angular 4 doesn't support two-way data binding, which is not true. The Angular team has made sure that we use forms as simple as we use in Angular 4, they just have a new syntax:
[(property-name)]="expression" <input type="text" [(ngMmodel)]="model.name" />
We still have two-way data binding. Although, to improve the Angular digest cycle and performance by default, we don't use two-way data binding. It uses a unidirectional binding that we can extend to two-way binding when we require it. You can refer to Angular template syntax to demystify all other syntax's and their uses ...
