I'm working on a Qt project, and our convention is to have a pure C++ back-end (i.e., STL), but use QObjects everywhere on the Models, Views and Controllers (as

I'm working on a Qt project, and our convention is to have a pure C++ back-end (i.e., STL), but use QObjects everywhere on the Models, Views and Controllers (as per Qt's MVC pattern). That way we can one day re-implement the UI if needed and keep the same "pure" C++ back-end. This has worked fine for us so far.