Quote Originally Posted by kaynide View Post
...because the Kairos Machine is going to be important in future content related to the 7th calamity. (Why nobody remembers what happened after Bahamut).
I don't think there's any reason to assume that's the case.

We were told that the memory loss around Bahamut is likely to be around the sheer amount of aether people were blasted with at the time. I feel like that's meant to be the full explanation for a long-standing oddity, not a setup for a bigger revelation still.

Kairos might be important for some other plot point – perhaps even Pandaemonium – but I didn't get the impression that it would be anything to do with Bahamut.