Wanda doesn't reminisce about her other lives as much as she used to. What with how different this life is and the way her name has changed over the centuries, some of the memories fading into each other, it's more like the things happened to another person, not herself.
She doesn't miss those lives, she never has, but she doesn't think about them anymore either.
This life is all she wants now, and it's going to end soon. She can't kill Melanie by leaving her trapped in here, screaming to get out. She refuses to.
And she refuses to leave Ian. No, she has lived here and will die here, almost as if nothing in her past had ever happened.
She doesn't care about the past anymore. All that matters is right now.