If you, after 20 years, can process all your chat history with a (locally run!) AI, you may find a lot of interesting things about yourself and your friends.
So might anyone else, which is very worrying with the new rise of facism.
But why? Genuine question, What's the point? It's not going to improve anything.
It is much more likely that someone else will process all my chat history at a border checkpoint or somewhere similar and find out a lot of interesting things about me and my friends.