users aren’t finetuning models after every chat

Users can do that if they want, but it’s more effective and more efficient to do that after every billion chats, and I’m sure OpenAI does it.

If you want the entire model to remember everything it talked about with every user, sure. But ideally, I would want the model to remember what I told it a few million tokens ago, but not what you told it (because to me, the model should look like my private copy that only talks to me).