It is very easy to avoid plagiarism in age of Ai, more so than before, I would guess. Ai can be asked to paraphrase someone's work in different style and if that is not enough, it can be repeated multiple times using the output as input of another pass and eventually no one can tell what the source was after couple of passes, not even the author. In essence, obvious forms of plagiarism of the past is of bygone era.

TIL that it comes from Latin (obviously) word plaga, meaning “a net, snare, or hunting net” (and sometimes “a blow from a whip”). And from this came plagium (kidnapping) and plagiarius (kidnapper).