"If Folkmore is a place out of time, then I have no idea if my memories will change because of Sephiroth's actions. But it doesn't matter."

It does. Vincent ignores the way his heart stings a touch at the thought of losing the friends he earned. Well... he's made his choice. And there are a lot of possibilities floating around, differing realities, timelines, the ability to keep memories both old and new. It's better to focus on the here and now than be distracted.

"If you're asking that question, what did he tell you about his future?"