For me, AI helping with writing email has been wonderful. I do a lot of email that is fairly generic and really just needs a basic template for replying or informing people. For those tasks it works great. I also had a more serious email that I wasn't sure how to respond to and needed to make sure the tone was appropriate and AI helped me get a good draft to work from.
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.