Quote Originally Posted by Mack View Post
EDIT: actually a better example would probably be having an AH and MW at the same time, sure either one is optional but if everyone congregates to using one over the other, it makes the other choice obsolete and the one doesn't become optional. Its obviously not to the same degree but its a point and its been made.
That is a perfect example, I agree. A superior system will always effectively replace an inferior system, and both "AH v. MW" and "global chat v. shout" are shining examples of this.