nth_color said:
For blue-haired characters I can do an ai:blue_hair search, and if there's a character who I only remember by their appearance then I'm going to try using Google first to find out their name or ask ChatGPT, Danbooru wouldn't be my first or second option for that.
Not all character traits can be searched with an AI search. For example, ai:jirai_kei doesn't work, that's a tag I frequently search for without particularly caring about what the artist, characters or copyright of each image is. Not to mention that the AI isn't unfalliable. It will frequently miss things and mistake things for other things. If it was perfect then tagging wouldn't be a requirement at all. Also not all characters can be easily found with google or GPT. OCs or characters from smaller or newer franchises for example.