Personally I kind of like dumb models. Dumb models means I don't have to think too hard about "a.affect(b)" vs "b.be_affected_by(a)". I can just write functions

Personally I kind of like dumb models. Dumb models means I don't have to think too hard about "a.affect(b)" vs "b.be_affected_by(a)". I can just write functions that do what I want right now. "do_my_thing(a, b)". No reason to be doing anything else when programming. If you have people making controllers inherit each other just to share functionality then they're probably brainwashed by OOP. Stuff like inheritance and mixins only exist to solve fake problems that make no sense outside of C# or Java. To me, singletons and plain-ole-functions are pretty easy to deal with in most languages - I just ask the editor where a function gets used or where it's defined. If your language doesn't support that kind of thing (looking at you, Ruby) then again that's another problem caused by tooling.