ng3000: What is Angular 2 and 4, Why Did They Skip Angular 3, and Why Should I Update from Angular 1.x?

Let's traverse the Angular terrain from the beginning! From discussing the basics of Angular in general, to the big changes from Angular 1.x to Angular 2, to why they skipped Angular 3 and what Angular 4 will bring us - and beyond, we will get a solid understanding of the benefits (okay, and maybe a few drawbacks) of Angular, how to understand their versioning and what exactly it means to us.