File -> Exit was a well known, well used convention. Now some users are left scratching their heads. Why change it? Why break with convention? What benefits does its removal confer?

Taking a convention and breaking it, for no good reason, is surely the epitome of lousy UI design. And my question remains: why does Alt F then X still work? Why would they elect to remove a button but maintain the key shortcuts?

I repeat: what were they playing at?!?!?