Swift is a really approachable language, it’s core features are simple and the code is very readable. You can write any app without having to use generics, extensions, protocols, more esoteric enum features, etc, etc.

But once you learn to use the more advanced features, your code just gets easier to write and maintain. I enjoy that I can pickup new language features in Swift one at a time, figuring out where each adds its best value, and occasionally refactoring to take advantage as part of my ongoing efforts to minimize code debt.