There are currently ~2300 works in AO3 tagged with "Created Using Generative AI"
I'll be upfront with my opinion, which mirrors my opinion in regards to my field: using AI will only hasten your own obsolescence. The point of fanfiction is not to crank out fics, but rather to enjoy the hobby and communities of writing and fandom.
Give me a 1000 fics written by baby writers with bad grammer, bad plot and bad characterisation over ANY Ai generated fic!!!!
I would rather see passionate beginner writers make thier first, and admititantly awful, steps into fandom. They are out future, not a machine!!!
I will never read AI. I will never use AI. Give me real humans.