I mean not all big music acts need to have dance floor appeal, i don't really have an opinion on her as a live performer but her crowd at coachella in 2019 was louder than Ariana Grande who was the headliner that night. Her and Olivia Rodrigo just seem to be the only post 2000 born commercial pop superstars so theres gotta be a combination of factors to be that big
I'm saying that she has zero dance floor appeal. She's also not a particularly good performer. All she really has going is that teenage angst shtick which is quickly approaching the end of its shelf life.
She really needs an overdose or a plane crash to secure her legend. Beyond that she's pretty forgettable