The worst is when the abstraction is designed prematurely for some limited use case, and then when you want to expand on it, you're stuck in some rigid format a

The worst is when the abstraction is designed prematurely for some limited use case, and then when you want to expand on it, you're stuck in some rigid format and have to either hack at it or rebuild the entire abstraction. This is a major reason why I no longer like OOP (I used to be religiously wed to it). Lightweight functions in modules, with structures that basically just hold data can be cleaner and far more flexible than a big object.