For me complete privacy is a must-have for an LLM that gets access to pretty much all my data (mails, calendar, location, browser history, chats, address book,

For me complete privacy is a must-have for an LLM that gets access to pretty much all my data (mails, calendar, location, browser history, chats, address book, health, app use, ...). But there are other benefits such as the availability, even when your phone is offline, latency and no cost per use.