Personalization vs privacy is always a trade-off
1) if you want AI chat more like your friends, it means the system(AI) need to know more about you, you have to expose more personal information and less privacy
2) Incognito is safer, but it will look like a cold start and less personalized.
Meta making claims like "private" and "even Meta can't see." lol. Has the credibility debt of an org around a specific issue ever been higher? It's like a goldfish trying to gaslight.