That’s already happening. Slightly different example, but Home Assistant has an integration that gives an LLM of your choice control over your home automation devices. Just talking to your home in natural language without having to memorize very specific phrases is honestly pretty powerful, as long as it works correctly. You can say stuff like “hey it’s a bit dark in the office”, and it just knows to either switch on the office lights, or make them brighter if they’re already on

Except if you continue reading beyond your Quote, it goes on to explain why that actually doesn’t help.

Companies and their legal departments do care though, and that’s where the big money lies for Microsoft when it comes to Windows

Training and fine tuning happens offline for LLMs, it’s not like they continuously learn by interacting with users. Sure, the company behind it might record conversations and use them to further tune the model, but it’s not like these models inherently need that

Except the email in question is not a newsletter. Companies often use separate mail list services for important product announcements and similar things as well. Obviously there should be a process in place that removes you from these external services too when you delete your account, but I assume this is what broke down in this case