1) Classical inheritance is a restricted form of Prototypal inheritance. They can coexist. The vast majority of the world uses Classical inheritance, and ther

1) Classical inheritance is a restricted form of Prototypal inheritance. They can coexist. The vast majority of the world uses Classical inheritance, and there are folks (like jashkenas) who make the case that all uses of the inheritance pattern are classical (See: http://news.ycombinator.com/item?id=2594521 http://news.ycombinator.com/item?id=2594521 ). 2) Isn't this entirely naive speculation of a technical topic? If classical inheritance can be optimized to be faster than prototypal... isn't that a good thing? Do you really think that Classical vs Prototypal inheritance is a zero-sum game?