I think the main problem with these abstractions that they are merely indirections in most cases, limiting the usefulness to several use cases (sometimes to thi

I think the main problem with these abstractions that they are merely indirections in most cases, limiting the usefulness to several use cases (sometimes to things that never going to be needed). To quote Dijsktra: "The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise."