So, to square things out a bit: the bit about "Final Fantasy" being a reference to Squaresoft's last shot at success, that's actually been debunked. They really just went for the "FF" alliteration. Although it is true they'd have been boned if the game hadn't worked, it didn't affect the game's name in a significant way. Now, why can there be so many? Well, just the same as any other recurring series: it was, and still is, commercially successful. Also, bear in mind, each game takes place in its own, self-contained universe, with its own lore. So there's hardly any issue with those games being "final", in the sense that there won't be sequels (with two exceptions, out of 15 games). Oh, and OP, don't worry too much, what seems to have happened is that EndWalker was such a ridiculously massive commercial success (and deservedly so), that Square had to close the servers down for a while until they can maintain the activity. Actually, a bunch of commercial content was cancelled because Square didn't want to promote a product that doesn't work. Tl;dr: it sucks balls, but you're gonna have the time of your life when it's fixed!