Quote Originally Posted by Sapphic View Post
They did a live broadcast with the news that this year they are doing a 3 part content update Rhapsodies of Vanadiel, 1st part is out, and after the 3rd part there will be no new content, just balance and bug fix patches. Also next year they are dropping console support so will be PC onry.

How long it lasts after that, who knows, but as no new content, probably not that long.
I'd think it'd depend on how much they spend maintaining the realms. FFXI is a subscriction game still that (at least used to) charge extra for each extra character. Without development costs being an issue, and only the PC version being around to maintain they could keep it running for quite some time.