Polymorphism yes, but there is no class structure to combine state and behavior. I suppose OO is pretty subjective and I should say most folks wouldn't consider Julia to be OO in nature.
I respect your lisp skills, but isn't what you're saying that "sure a tank can fly...you just need really big wings and and a giant rocket engine strapped on the back"? I'll agree that you can hack on your own object system, but aren't you essentially towing a yacht with a Honda Fit? Or do I misunderstand?
