Memory

Is there some hidden option or something for memory? What for are memories? What's the point even buying better subscription when AI barely store any memories and even less use? I can have story for half an hour and AI store maybe one or two and don't even use them. And there is some secret for having characters different personalities? Because, no matter what character have a person, answers are mostly the same, the only thing that change that how theoretical people talk, in what tone. But the are saying the same things, thinking the same. Like making more people feels pointless when I just feel like I'm constantly talking with one person.