To honestly discuss the topic I will say that we have been doing a lot of the same things for a long time, and without something changing or bringing a renewed energy to the game it will probably experience slow decline. That isn't really that unusual for the MMO space though, no one remains on top forever and XIV isn't any different. I doubt it will actually shut down any time soon, but will probably end up in the same state as XI in a few more expansions with a small but dedicated community keeping it aloft.