For me, an important distinction is whether or not a human is reviewing the edits suggested by an AI.

I toss all of my work into Apple Pages and Google Docs, and use them both for spelling and grammar check. I don't just blindly accept whatever they tell me, though; sometimes they're wrong, and sometimes my "mistakes" are intentional.

I also make a distinction between generating content and editing content. Spelling and grammar checkers are fine. Having an AI generate your outline is questionable. Having AI generate your content is unacceptable.