my autistic brain hates the term "Modern AU" because it's not specific enough. It's shorthand, but it's shitty shorthand. "Modern AU" could mean other things, most of which I'm more interested in than what "Modern AU" is universally assumed to mean.
What yall mean is, like, "Modern Earth, No Magic, Alternate Universe Setting", which could have been turned into something unique and easy to read and filter like "memnaus"
But instead, it's like how the USA isn't actually the only country comprised of united states located in America, nor are its citizens the only "Americans". Imagine saying rectangle when you meant square, and expecting people to extrapolate. Is it accurate? Yes. But come on, man. Stop hogging words
What about AUs where it's the same setting but with modern amenities? (Elves in Rivendell with smartphones, Dragons getting scammed by bitcoin, there's a Starbucks on every corner in Jinlintai, dnd bards on tiktok, Link has a nintendo switch-- wait...)
What about AUs where it's modern earth but the characters are still whatever fantasy species and/or profession they started as? (Bilbo is a hobbit who lives in rural modern England, Leliana is actually French and Zevran is actually from Spain, everything is normal modern earth but Witchers just exist, Jiang Cheng lives in Yunmeng-- wait...)
What about characters from their original setting getting isekai-ed into our modern earth? That's an in-story modern alternate universe! (Shang Qinghua DOES leave and Mobei Jun fuckin follows him! King Arthur joins a Connecticut Baseball Team! Inuyasha falls through a portal and has to go to modern earth high school-- wait...)
Anyway "Modern AU" fans have fandom default privilege, and I'm cranky about language nuance. I feel like if these concepts had more well known differentiating terms, more people would think to write about them. Instead "Modern AU" means only "the characters, but stripped of their context"
"Modern Earth, No Magic, Alternate Universe Setting" or "Memnaus"
"Canon Universe With Amenities of Modern Earth" or "Cuwame"
"Modern Earth Setting, plus--" or "Mesp--" then you add whatever you're keeping, like "mesp fairies" or "mesp cultivators" or "mesp magic system"
"Isekai" is already a thing, I just think "canon character isekai-s to earth" should be more popular
Some of these need help, I encourage audience participation