Earlier quoted context omitted.
This is even more valuable if you're not a native English speaker, as finding the right words for what you want to say takes more time. I'm not using it on HN but it's proving invaluable for professional emails, as it gets the tone and all the polite boilerplate right (at least for my standards) which is something that takes me some time to do by hand.
"which is something that takes me some time to do by hand. " Yes, but this is how you learn it vs. always be dependant on an AI to communicate for you.
But I don't think professional email boilerplate is really worth learning if an AI can handle it.