I've been pondering moving to a similar structure for Object::LocalVars. It would give the same general benefits of inside-out classes, and it makes object destruction a little simpler -- just one reference to delete rather than deleting each attribute individually. Ditto for CLONE (which I don't think Class::Std handles properly yet.) I haven't gotten around to benchmarking this approach yet, though, so there is some risk that this is premature optimization.