[mcv]

I haven't done much with Angular 2+ (I use Vue now), but in my Angular 1 days, I've definitely seen a lot of Angular apps that were basically put together like a jQuery app. Massive controllers, lots of dom manipulation and logic in the controllers. My approach at the time was that controllers should be as small and simple as possible, with most business logic, data models, communication, etc extracted to services. The controller should just connect the various parts, nothing more. But when you're used to unstructured jQuery, the controller is an obvious place to just put everything.