I have zero interest in Ai helping me to write or rewrite email or other text. Siri maybe, lets hope it finally becomes somewhat useful, considering how useless and stupid the current version is.
Email is one of those things that I would put off as I just found it hard to get started and would worry about grammatical error and trivial mistakes that people seem to focus on more than they should. AI has helped me just be better at email.
My impression of LLM-generated emails has been they tend towards verbosity. At least relative to the minimal-characters some higher-role folks prefer.
I haven't spent much time trying to get them to exec memo edit/format information.
I enjoy seeing entire text threads and email chain summarized in a notification. Really helps choose what is worth reading now vs later