it would be quite interesting to see that trope actually get a name, cause it feels quite overused personally, recently even freaking one piece did it

one of my favorite recent fantasy mangas (helck) also had a pretty…detestably quality with it, the ending was basically “how is thing happening? why? HOW??” and than boom…ancient but also post apocalyptic

however, at least they give it a small spin by basically just being modern day, with a bit of cyberpunk tech