Not girls who had a good run and then tapered off, like say Jennifer Lawrence. This are girls who were meant to have huge careers (https://tvtropes.org/pmwiki/pmwiki.php/Main/HollywoodHypeMachine), but suddenly disappeared.

Of course, some of these actors are still working but they aren't any where close to where they were during their "glory days" as bankable stars or when they were hyped as the next big thing. Some's fall from grace may be more obvious than others (drugs, egos, ageism, too many box office bombs in a row, Harvey Weinstein), but it still worth the discussion for why some actors' relevancy in Hollywood and impact last while others ultimately fade. If you have been following the currently in limbo "What the Hell Happened to..." series on Lebeau's Le Blog, then you'll know what I'm talking about:
https://lebeauleblog.com/category/movies/what-the-hell-happened/wthh-actor/

https://lebeauleblog.com/category/movies/what-the-hell-happened/wthh-actress/