I don't see why would I want to assign my bound class methods to external variable, and if you do that, you are responsible to bind the method to an instance. T

I don't see why would I want to assign my bound class methods to external variable, and if you do that, you are responsible to bind the method to an instance. The reason it is a class method is because it operates on that class, taking it out and using it externally is against the purpose of it's existence.