Originally Posted by
alenore
I think the point is the world is much more transversal between expansions.
It's pretty uncommon in WoW to have to do any quest in a previous zone when an expansion is released (except capitals obv). Allied Race and Artifact quests did that and it was nice, however Legion is really the first time it happened.
Now in FF, current content often tie in old areas, NPCs, etc. One example of that would be the refugee from Dalmasca you have to meet in Eastern La Noscea when unlocking Ridorana. Most of the old crafting items are still used (thanks Housing!).
The whole Eureka area is a throwback to the end of 2.3 (when the Isle of Val was seemingly obliterated by an Ultima-like spell). Most Job/class quests still have you go through Idylshire for it, or the RDM quest, even though it's old content.
In short, they still build upon what they created before, unlike WoW where the expansion content is self-contained. You could almost never leave the broken isle/argus and there would barely be any difference.