ChatGPT has had the ability to add things for it to memorize for a while. Expanding that feature would be a good thing. However, I often use temporary chats specifically to avoid things being remembered. If I ask ChatGPT some random question that only has relevance in the moment (e.g., "What is the capital of North Dakota?"), I don't want it thinking it should always find the Bismarck angle on how to answer my questions.
Another change I have noticed in ChatGPT, a few days back a new ChatBot appeared in my sidebar. It says it is an experiment by ChatGPT to give bots more personality. They want to see if that changes the way users interact with ChatGPT. The particular personality it put in this bot is a smart ass. It started out being personally insulting, which was funny, but quickly got old. I told it to tone down the personal insults. Now it is like a sarcastic smart aleck. I find this new bot more engaging to interact with unless I am in a serious, get-work-done mode.