The problem with current crop of LLM models is that it makes for a great demo. I am also confident that you can build a working prototype for GMail, Outlook or any other surface. But I am equally confident it will be a massively different ballgame to role it out to a billion users. You'll run into a lot of edge cases and have to take care of a lot of adversarial scenarios as well. Pretty sure that's the same issue Apple is running into as well, and why they have had to postpone rollouts.