"After using magic and getting stuck in the past forever, Sally learns that she can possess herself, and realizes that by trying to change the past to match the present, she has forever changed her and the roommates' futures."

I can't find that a thread was ever made for this episode. And what a crazy episode it was! I do hope this is temporary, though, and we get a reset to the original timeline soon.

Yeah, that was crazy! Basically rewrote the entire history of the show in one episode. I imagine there will be a reset back to the original past--I will be pissed if there isn't. Though--if the show wasn't ending this season--it might have been interesting to have a longer arc dedicated to this new timeline.

Sally just doesn't know when to leave things well enough alone. She always makes things worse when she meddles.

I guess this was an alternative idea they considered for Sally, getting into a relationship with Aidan. I felt it was kind of unnecessary to go over so much history in one episode, they had to keep skipping ahead to cram four years of stories into a single episode.

Sally is pretty much responsible for every bad thing that has happened. No one should trust her decision making at all.

It wouldn't really make any narrative sense if things weren't reset back to how it was. There's several plotlines from this season that would just disappear without resolution otherwise.

I thought it was a really cool concept and liked how fast they paced it out.