How defensible is AI memory?

If I use ChatGPT and it updates its memory, then I throw the raw chat history into Claude -- how hard is it for Claude to reach "memory parity"?

(Assume there's easy import/export of chat history)

I think the way openai actually means it is in terms of ability to predict what the user wants and get them to do things. The modern equivalent of ad targeting.
If you play with 4o for a week it’ll try to form a relationship with you and can be very persuasive.
I think Claude and gpt will stay differentiated here because it’s a matter of alignment and they have different POV on alignment.