The title is funny because it seems like a tautology. Of course MMOs change over time! That’s part of what makes them so damned appealing to a lot of people. It’s why many MMOs survive for a decade or more whereas traditional games are lucky to still see active play for even half that long. This is why a “sequel” to an existing MMO doesn’t seem too bright.
But, this fact does seem to take some people by surprise. They go along and then suddenly they realize that this isn’t the game game the were playing years ago. They wonder what happened to the elements that made them fall in love.