I used to think plagiarism was my worst thing to deal with as an editor. That is only sort of true now. Now the biggest headache has become figuring out who has used AI to do their writing and to what extent. Often that is even less easy than it even sounds.
While there are websites and software tools that will give you an idea of whether AI has been used, it isn’t completely reliable and no one wants to lose an author who is accidentally dinged because they write in a way that seems like it might have been