Why not just prototype inheritance with multiple inheritance? Like Self. The class-instance duality is removed then, and everything is just an editable object.

Why not just prototype inheritance with multiple inheritance? Like Self. The class-instance duality is removed then, and everything is just an editable object. This always made the most sense to me. Then just having the 'universe' be a map of id->obj with prototype inheritance, then editing the universe being reduxy and just a reduce over the objects, with the reduce polymorphised over the object's inheritance (this is the benefit of OO, really, not mutable update)--brings wins of functional, prototype, OO all together.