My timeline is basically a do-over of the last one after a couple of... entities... made a bet about humanity's capacity for enlightenment and Team Evil decided to "help" things along. The end result of that was humanity being reduced to the surviving population of a city that got launched into space on a ship while the rest of Earth was destroyed, because rumors had started indiscriminately coming true by that point and one of those rumors just so happened to be a doomsday prophecy.

Philemon more or less reset things after that, but its continued existence relies on a group of kids never remembering that they knew each other in the old timeline - if they all remember, that's it. Nyarlathotep tried to force that for a repeat win, but ended up losing. I'm from just after the end of that mess, which was in... 1999. No idea if my timeline's connected to any others - I know there are other places and times where Persona users are a thing, but it doesn't seem to work the same as it does in my world.